<?php

require_once 'HTMLPurifier/Lexer/DOMLex.php';

/**
 * Experimental HTML5-based parser using Jeroen van der Meer's PH5P library.
 * Requires PHP5, and occupies space in the HTML5 pseudo-namespace (may
 * cause conflicts, sorry).
 */

class HTMLPurifier_Lexer_PH5P extends HTMLPurifier_Lexer_DOMLex {
	
	public function tokenizeHTML($html, $config, &$context) {
		$html = $this->normalize($html, $config, $context);
		$html = $this->wrapHTML( $html, $config, $context);
		$parser = new HTML5($html);
		$doc = $parser->save();
		$tokens = array();
		$this->tokenizeDOM(
			$doc->getElementsByTagName('html')->item(0)-> // <html>
				  getElementsByTagName('body')->item(0)-> //   <body>
				  getElementsByTagName('div')->item(0)	//	 <div>
			, $tokens);
		return $tokens;
	}
	
}

/*

Copyright 2007 Jeroen van der Meer <http://jero.net/> 

Permission is hereby granted, free of charge, to any person obtaining a 
copy of this software and associated documentation files (the 
"Software"), to deal in the Software without restriction, including 
without limitation the rights to use, copy, modify, merge, publish, 
distribute, sublicense, and/or sell copies of the Software, and to 
permit persons to whom the Software is furnished to do so, subject to 
the following conditions: 

The above copyright notice and this permission notice shall be included 
in all copies or substantial portions of the Software. 

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 

*/

class HTML5 {
	private $data;
	private $char;
	private $EOF;
	private $state;
	private $tree;
	private $token;
	private $content_model;
	private $escape = false;
	private $entities = array('AElig;','AElig','AMP;','AMP','Aacute;','Aacute',
	'Acirc;','Acirc','Agrave;','Agrave','Alpha;','Aring;','Aring','Atilde;',
	'Atilde','Auml;','Auml','Beta;','COPY;','COPY','Ccedil;','Ccedil','Chi;',
	'Dagger;','Delta;','ETH;','ETH','Eacute;','Eacute','Ecirc;','Ecirc','Egrave;',
	'Egrave','Epsilon;','Eta;','Euml;','Euml','GT;','GT','Gamma;','Iacute;',
	'Iacute','Icirc;','Icirc','Igrave;','Igrave','Iota;','Iuml;','Iuml','Kappa;',
	'LT;','LT','Lambda;','Mu;','Ntilde;','Ntilde','Nu;','OElig;','Oacute;',
	'Oacute','Ocirc;','Ocirc','Ograve;','Ograve','Omega;','Omicron;','Oslash;',
	'Oslash','Otilde;','Otilde','Ouml;','Ouml','Phi;','Pi;','Prime;','Psi;',
	'QUOT;','QUOT','REG;','REG','Rho;','Scaron;','Sigma;','THORN;','THORN',
	'TRADE;','Tau;','Theta;','Uacute;','Uacute','Ucirc;','Ucirc','Ugrave;',
	'Ugrave','Upsilon;','Uuml;','Uuml','Xi;','Yacute;','Yacute','Yuml;','Zeta;',
	'aacute;','aacute','acirc;','acirc','acute;','acute','aelig;','aelig',
	'agrave;','agrave','alefsym;','alpha;','amp;','amp','and;','ang;','apos;',
	'aring;','aring','asymp;','atilde;','atilde','auml;','auml','bdquo;','beta;',
	'brvbar;','brvbar','bull;','cap;','ccedil;','ccedil','cedil;','cedil',
	'cent;','cent','chi;','circ;','clubs;','cong;','copy;','copy','crarr;',
	'cup;','curren;','curren','dArr;','dagger;','darr;','deg;','deg','delta;',
	'diams;','divide;','divide','eacute;','eacute','ecirc;','ecirc','egrave;',
	'egrave','empty;','emsp;','ensp;','epsilon;','equiv;','eta;','eth;','eth',
	'euml;','euml','euro;','exist;','fnof;','forall;','frac12;','frac12',
	'frac14;','frac14','frac34;','frac34','frasl;','gamma;','ge;','gt;','gt',
	'hArr;','harr;','hearts;','hellip;','iacute;','iacute','icirc;','icirc',
	'iexcl;','iexcl','igrave;','igrave','image;','infin;','int;','iota;',
	'iquest;','iquest','isin;','iuml;','iuml','kappa;','lArr;','lambda;','lang;',
	'laquo;','laquo','larr;','lceil;','ldquo;','le;','lfloor;','lowast;','loz;',
	'lrm;','lsaquo;','lsquo;','lt;','lt','macr;','macr','mdash;','micro;','micro',
	'middot;','middot','minus;','mu;','nabla;','nbsp;','nbsp','ndash;','ne;',
	'ni;','not;','not','notin;','nsub;','ntilde;','ntilde','nu;','oacute;',
	'oacute','ocirc;','ocirc','oelig;','ograve;','ograve','oline;','omega;',
	'omicron;','oplus;','or;','ordf;','ordf','ordm;','ordm','oslash;','oslash',
	'otilde;','otilde','otimes;','ouml;','ouml','para;','para','part;','permil;',
	'perp;','phi;','pi;','piv;','plusmn;','plusmn','pound;','pound','prime;',
	'prod;','prop;','psi;','quot;','quot','rArr;','radic;','rang;','raquo;',
	'raquo','rarr;','rceil;','rdquo;','real;','reg;','reg','rfloor;','rho;',
	'rlm;','rsaquo;','rsquo;','sbquo;','scaron;','sdot;','sect;','sect','shy;',
	'shy','sigma;','sigmaf;','sim;','spades;','sub;','sube;','sum;','sup1;',
	'sup1','sup2;','sup2','sup3;','sup3','sup;','supe;','szlig;','szlig','tau;',
	'there4;','theta;','thetasym;','thinsp;','thorn;','thorn','tilde;','times;',
	'times','trade;','uArr;','uacute;','uacute','uarr;','ucirc;','ucirc',
	'ugrave;','ugrave','uml;','uml','upsih;','upsilon;','uuml;','uuml','weierp;',
	'xi;','yacute;','yacute','yen;','yen','yuml;','yuml','zeta;','zwj;','zwnj;');

	const PCDATA	= 0;
	const RCDATA	= 1;
	const CDATA	 = 2;
	const PLAINTEXT = 3;

	const DOCTYPE  = 0;
	const STARTTAG = 1;
	const ENDTAG   = 2;
	const COMMENT  = 3;
	const CHARACTR = 4;
	const EOF	  = 5;

	public function __construct($data) {
		$data = str_replace("\r\n", "\n", $data);
		$date = str_replace("\r", null, $data);

		$this->data = $data;
		$this->char = -1;
		$this->EOF  = strlen($data);
		$this->tree = new HTML5TreeConstructer;
		$this->content_model = self::PCDATA;

		$this->state = 'data';

		while($this->state !== null) {
			$this->{$this->state.'State'}();
		}
	}

	public function save() {
		return $this->tree->save();
	}

	private function char() {
		return ($this->char < $this->EOF)
			? $this->data[$this->char]
			: false;
	}

	private function character($s, $l = 0) {
		if($s + $l < $this->EOF) {
			if($l === 0) {
				return $this->data[$s];
			} else {
				return substr($this->data, $s, $l);
			}
		}
	}

	private function characters($char_class, $start) {
		return preg_replace('#^(['.$char_class.']+).*#s', '\\1', substr($this->data, $start));
	}

	private function dataState() {
		// Consume the next input character
		$this->char++;
		$char = $this->char();

		if($char === '&' && ($this->content_model === self::PCDATA || $this->content_model === self::RCDATA)) {
			/* U+0026 AMPERSAND (&)
			When the content model flag is set to one of the PCDATA or RCDATA
			states: switch to the entity data state. Otherwise: treat it as per
			the "anything else"	entry below. */
			$this->state = 'entityData';

		} elseif($char === '-') {
			/* If the content model flag is set to either the RCDATA state or
			the CDATA state, and the escape flag is false, and there are at
			least three characters before this one in the input stream, and the
			last four characters in the input stream, including this one, are
			U+003C LESS-THAN SIGN, U+0021 EXCLAMATION MARK, U+002D HYPHEN-MINUS,
			and U+002D HYPHEN-MINUS ("<!--"), then set the escape flag to true. */
			if(($this->content_model === self::RCDATA || $this->content_model ===
			self::CDATA) && $this->escape === false &&
			$this->char >= 3 && $this->character($this->char - 4, 4) === '<!--') {
				$this->escape = true;
			}

			/* In any case, emit the input character as a character token. Stay
			in the data state. */
			$this->emitToken(array(
				'type' => self::CHARACTR,
				'data' => $char
			));

		/* U+003C LESS-THAN SIGN (<) */
		} elseif($char === '<' && ($this->content_model === self::PCDATA ||
		(($this->content_model === self::RCDATA ||
		$this->content_model === self::CDATA) && $this->escape === false))) {
			/* When the content model flag is set to the PCDATA state: switch
			to the tag open state.

			When the content model flag is set to either the RCDATA state or
			the CDATA state and the escape flag is false: switch to the tag
			open state.

			Otherwise: treat it as per the "anything else" entry below. */
			$this->state = 'tagOpen';

		/* U+003E GREATER-THAN SIGN (>) */
		} elseif($char === '>') {
			/* If the content model flag is set to either the RCDATA state or
			the CDATA state, and the escape flag is true, and the last three
			characters in the input stream including this one are U+002D
			HYPHEN-MINUS, U+002D HYPHEN-MINUS, U+003E GREATER-THAN SIGN ("-->"),
			set the escape flag to false. */
			if(($this->content_model === self::RCDATA ||
			$this->content_model === self::CDATA) && $this->escape === true &&
			$this->character($this->char, 3) === '-->') {
				$this->escape = false;
			}

			/* In any case, emit the input character as a character token.
			Stay in the data state. */
			$this->emitToken(array(
				'type' => self::CHARACTR,
				'data' => $char
			));

		} elseif($this->char === $this->EOF) {
			/* EOF
			Emit an end-of-file token. */
			$this->EOF();

		} elseif($this->content_model === self::PLAINTEXT) {
			/* When the content model flag is set to the PLAINTEXT state
			THIS DIFFERS GREATLY FROM THE SPEC: Get the remaining characters of
			the text and emit it as a character token. */
			$this->emitToken(array(
				'type' => self::CHARACTR,
				'data' => substr($this->data, $this->char)
			));

			$this->EOF();

		} else {
			/* Anything else
			THIS DIFFERS GREATLY FROM THE SPEC: Get as many character that
			otherwise would also be treated as a character token and emit it
			as a single character token. Stay in the data state. */
			$len  = strcspn($this->data, '<&', $this->char);
			$char = substr($this->data, $this->char, $len);
			$this->char += $len - 1;

			$this->emitToken(array(
				'type' => self::CHARACTR,
				'data' => $char
			));

			$this->state = 'data';
		}
	}

	private function entityDataState() {
		// Attempt to consume an entity.
		$entity = $this->entity();

		// If nothing is returned, emit a U+0026 AMPERSAND character token.
		// Otherwise, emit the character token that was returned.
		$char = (!$entity) ? '&' : $entity;
		$this->emitToken(array(
			'type' => self::CHARACTR,
			'data' => $char
		));

		// Finally, switch to the data state.
		$this->state = 'data';
	}

	private function tagOpenState() {
		switch($this->content_model) {
			case self::RCDATA:
			case self::CDATA:
				/* If the next input character is a U+002F SOLIDUS (/) character,
				consume it and switch to the close tag open state. If the next
				input character is not a U+002F SOLIDUS (/) character, emit a
				U+003C LESS-THAN SIGN character token and switch to the data
				state to process the next input character. */
				if($this->character($this->char + 1) === '/') {
					$this->char++;
					$this->state = 'closeTagOpen';

				} else {
					$this->emitToken(array(
						'type' => self::CHARACTR,
						'data' => '<'
					));

					$this->state = 'data';
				}
			break;

			case self::PCDATA:
				// If the content model flag is set to the PCDATA state
				// Consume the next input character:
				$this->char++;
				$char = $this->char();

				if($char === '!') {
					/* U+0021 EXCLAMATION MARK (!)
					Switch to the markup declaration open state. */
					$this->state = 'markupDeclarationOpen';

				} elseif($char === '/') {
					/* U+002F SOLIDUS (/)
					Switch to the close tag open state. */
					$this->state = 'closeTagOpen';

				} elseif(preg_match('/^[A-Za-z]$/', $char)) {
					/* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
					Create a new start tag token, set its tag name to the lowercase
					version of the input character (add 0x0020 to the character's code
					point), then switch to the tag name state. (Don't emit the token
					yet; further details will be filled in before it is emitted.) */
					$this->token = array(
						'name'  => strtolower($char),
						'type'  => self::STARTTAG,
						'attr'  => array()
					);

					$this->state = 'tagName';

				} elseif($char === '>') {
					/* U+003E GREATER-THAN SIGN (>)
					Parse error. Emit a U+003C LESS-THAN SIGN character token and a
					U+003E GREATER-THAN SIGN character token. Switch to the data state. */
					$this->emitToken(array(
						'type' => self::CHARACTR,
						'data' => '<>'
					));

					$this->state = 'data';

				} elseif($char === '?') {
					/* U+003F QUESTION MARK (?)
					Parse error. Switch to the bogus comment state. */
					$this->state = 'bogusComment';

				} else {
					/* Anything else
					Parse error. Emit a U+003C LESS-THAN SIGN character token and
					reconsume the current input character in the data state. */
					$this->emitToken(array(
						'type' => self::CHARACTR,
						'data' => '<'
					));

					$this->char--;
					$this->state = 'data';
				}
			break;
		}
	}

	private function closeTagOpenState() {
		$next_node = strtolower($this->characters('A-Za-z', $this->char + 1));
		$the_same = count($this->tree->stack) > 0 && $next_node === end($this->tree->stack)->nodeName;

		if(($this->content_model === self::RCDATA || $this->content_model === self::CDATA) &&
		(!$the_same || ($the_same && (!preg_match('/[\t\n\x0b\x0c >\/]/',
		$this->character($this->char + 1 + strlen($next_node))) || $this->EOF === $this->char)))) {
			/* If the content model flag is set to the RCDATA or CDATA states then
			examine the next few characters. If they do not match the tag name of
			the last start tag token emitted (case insensitively), or if they do but
			they are not immediately followed by one of the following characters:
				* U+0009 CHARACTER TABULATION
				* U+000A LINE FEED (LF)
				* U+000B LINE TABULATION
				* U+000C FORM FEED (FF)
				* U+0020 SPACE
				* U+003E GREATER-THAN SIGN (>)
				* U+002F SOLIDUS (/)
				* EOF
			...then there is a parse error. Emit a U+003C LESS-THAN SIGN character
			token, a U+002F SOLIDUS character token, and switch to the data state
			to process the next input character. */
			$this->emitToken(array(
				'type' => self::CHARACTR,
				'data' => '</'
			));

			$this->state = 'data';

		} else {
			/* Otherwise, if the content model flag is set to the PCDATA state,
			or if the next few characters do match that tag name, consume the
			next input character: */
			$this->char++;
			$char = $this->char();

			if(preg_match('/^[A-Za-z]$/', $char)) {
				/* U+0041 LATIN LETTER A through to U+005A LATIN LETTER Z
				Create a new end tag token, set its tag name to the lowercase version
				of the input character (add 0x0020 to the character's code point), then
				switch to the tag name state. (Don't emit the token yet; further details
				will be filled in before it is emitted.) */
				$this->token = array(
					'name'  => strtolower($char),
					'type'  => self::ENDTAG
				);

				$this->state = 'tagName';

			} elseif($char === '>') {
				/* U+003E GREATER-THAN SIGN (>)
				Parse error. Switch to the data state. */
				$this->state = 'data';

			} elseif($this->char === $this->EOF) {
				/* EOF
				Parse error. Emit a U+003C LESS-THAN SIGN character token and a U+002F
				SOLIDUS character token. Reconsume the EOF character in the data state. */
				$this->emitToken(array(
					'type' => self::CHARACTR,
					'data' => '</'
				));

				$this->char--;
				$this->state = 'data';

			} else {
				/* Parse error. Switch to the bogus comment state. */
				$this->state = 'bogusComment';
			}
		}
	}

	private function tagNameState() {
		// Consume the next input character:
		$this->char++;
		$char = $this->character($this->char);

		if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
			/* U+0009 CHARACTER TABULATION
			U+000A LINE FEED (LF)
			U+000B LINE TABULATION
			U+000C FORM FEED (FF)
			U+0020 SPACE
			Switch to the before attribute name state. */
			$this->state = 'beforeAttributeName';

		} elseif($char === '>') {
			/* U+003E GREATER-THAN SIGN (>)
			Emit the current tag token. Switch to the data state. */
			$this->emitToken($this->token);
			$this->state = 'data';

		} elseif($this->char === $this->EOF) {
			/* EOF
			Parse error. Emit the current tag token. Reconsume the EOF
			character in the data state. */
			$this->emitToken($this->token);

			$this->char--;
			$this->state = 'data';

		} elseif($char === '/') {
			/* U+002F SOLIDUS (/)
			Parse error unless this is a permitted slash. Switch to the before
			attribute name state. */
			$this->state = 'beforeAttributeName';

		} else {
			/* Anything else
			Append the current input character to the current tag token's tag name.
			Stay in the tag name state. */
			$this->token['name'] .= strtolower($char);
			$this->state = 'tagName';
		}
	}

	private function beforeAttributeNameState() {
		// Consume the next input character:
		$this->char++;
		$char = $this->character($this->char);

		if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
			/* U+0009 CHARACTER TABULATION
			U+000A LINE FEED (LF)
			U+000B LINE TABULATION
			U+000C FORM FEED (FF)
			U+0020 SPACE
			Stay in the before attribute name state. */
			$this->state = 'beforeAttributeName';

		} elseif($char === '>') {
			/* U+003E GREATER-THAN SIGN (>)
			Emit the current tag token. Switch to the data state. */
			$this->emitToken($this->token);
			$this->state = 'data';

		} elseif($char === '/') {
			/* U+002F SOLIDUS (/)
			Parse error unless this is a permitted slash. Stay in the before
			attribute name state. */
			$this->state = 'beforeAttributeName';

		} elseif($this->char === $this->EOF) {
			/* EOF
			Parse error. Emit the current tag token. Reconsume the EOF
			character in the data state. */
			$this->emitToken($this->token);

			$this->char--;
			$this->state = 'data';

		} else {
			/* Anything else
			Start a new attribute in the current tag token. Set that attribute's
			name to the current input character, and its value to the empty string.
			Switch to the attribute name state. */
			$this->token['attr'][] = array(
				'name'  => strtolower($char),
				'value' => null
			);

			$this->state = 'attributeName';
		}
	}

	private function attributeNameState() {
		// Consume the next input character:
		$this->char++;
		$char = $this->character($this->char);

		if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
			/* U+0009 CHARACTER TABULATION
			U+000A LINE FEED (LF)
			U+000B LINE TABULATION
			U+000C FORM FEED (FF)
			U+0020 SPACE
			Stay in the before attribute name state. */
			$this->state = 'afterAttributeName';

		} elseif($char === '=') {
			/* U+003D EQUALS SIGN (=)
			Switch to the before attribute value state. */
			$this->state = 'beforeAttributeValue';

		} elseif($char === '>') {
			/* U+003E GREATER-THAN SIGN (>)
			Emit the current tag token. Switch to the data state. */
			$this->emitToken($this->token);
			$this->state = 'data';

		} elseif($char === '/' && $this->character($this->char + 1) !== '>') {
			/* U+002F SOLIDUS (/)
			Parse error unless this is a permitted slash. Switch to the before
			attribute name state. */
			$this->state = 'beforeAttributeName';

		} elseif($this->char === $this->EOF) {
			/* EOF
			Parse error. Emit the current tag token. Reconsume the EOF
			character in the data state. */
			$this->emitToken($this->token);

			$this->char--;
			$this->state = 'data';

		} else {
			/* Anything else
			Append the current input character to the current attribute's name.
			Stay in the attribute name state. */
			$last = count($this->token['attr']) - 1;
			$this->token['attr'][$last]['name'] .= strtolower($char);

			$this->state = 'attributeName';
		}
	}

	private function afterAttributeNameState() {
		// Consume the next input character:
		$this->char++;
		$char = $this->character($this->char);

		if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
			/* U+0009 CHARACTER TABULATION
			U+000A LINE FEED (LF)
			U+000B LINE TABULATION
			U+000C FORM FEED (FF)
			U+0020 SPACE
			Stay in the after attribute name state. */
			$this->state = 'afterAttributeName';

		} elseif($char === '=') {
			/* U+003D EQUALS SIGN (=)
			Switch to the before attribute value state. */
			$this->state = 'beforeAttributeValue';

		} elseif($char === '>') {
			/* U+003E GREATER-THAN SIGN (>)
			Emit the current tag token. Switch to the data state. */
			$this->emitToken($this->token);
			$this->state = 'data';

		} elseif($char === '/' && $this->character($this->char + 1) !== '>') {
			/* U+002F SOLIDUS (/)
			Parse error unless this is a permitted slash. Switch to the
			before attribute name state. */
			$this->state = 'beforeAttributeName';

		} elseif($this->char === $this->EOF) {
			/* EOF
			Parse error. Emit the current tag token. Reconsume the EOF
			character in the data state. */
			$this->emitToken($this->token);

			$this->char--;
			$this->state = 'data';

		} else {
			/* Anything else
			Start a new attribute in the current tag token. Set that attribute's
			name to the current input character, and its value to the empty string.
			Switch to the attribute name state. */
			$this->token['attr'][] = array(
				'name'  => strtolower($char),
				'value' => null
			);

			$this->state = 'attributeName';
		}
	}

	private function beforeAttributeValueState() {
		// Consume the next input character:
		$this->char++;
		$char = $this->character($this->char);

		if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
			/* U+0009 CHARACTER TABULATION
			U+000A LINE FEED (LF)
			U+000B LINE TABULATION
			U+000C FORM FEED (FF)
			U+0020 SPACE
			Stay in the before attribute value state. */
			$this->state = 'beforeAttributeValue';

		} elseif($char === '"') {
			/* U+0022 QUOTATION MARK (")
			Switch to the attribute value (double-quoted) state. */
			$this->state = 'attributeValueDoubleQuoted';

		} elseif($char === '&') {
			/* U+0026 AMPERSAND (&)
			Switch to the attribute value (unquoted) state and reconsume
			this input character. */
			$this->char--;
			$this->state = 'attributeValueUnquoted';

		} elseif($char === '\'') {
			/* U+0027 APOSTROPHE (')
			Switch to the attribute value (single-quoted) state. */
			$this->state = 'attributeValueSingleQuoted';

		} elseif($char === '>') {
			/* U+003E GREATER-THAN SIGN (>)
			Emit the current tag token. Switch to the data state. */
			$this->emitToken($this->token);
			$this->state = 'data';

		} else {
			/* Anything else
			Append the current input character to the current attribute's value.
			Switch to the attribute value (unquoted) state. */
			$last = count($this->token['attr']) - 1;
			$this->token['attr'][$last]['value'] .= $char;

			$this->state = 'attributeValueUnquoted';
		}
	}

	private function attributeValueDoubleQuotedState() {
		// Consume the next input character:
		$this->char++;
		$char = $this->character($this->char);

		if($char === '"') {
			/* U+0022 QUOTATION MARK (")
			Switch to the before attribute name state. */
			$this->state = 'beforeAttributeName';

		} elseif($char === '&') {
			/* U+0026 AMPERSAND (&)
			Switch to the entity in attribute value state. */
			$this->entityInAttributeValueState('double');

		} elseif($this->char === $this->EOF) {
			/* EOF
			Parse error. Emit the current tag token. Reconsume the character
			in the data state. */
			$this->emitToken($this->token);

			$this->char--;
			$this->state = 'data';

		} else {
			/* Anything else
			Append the current input character to the current attribute's value.
			Stay in the attribute value (double-quoted) state. */
			$last = count($this->token['attr']) - 1;
			$this->token['attr'][$last]['value'] .= $char;

			$this->state = 'attributeValueDoubleQuoted';
		}
	}

	private function attributeValueSingleQuotedState() {
		// Consume the next input character:
		$this->char++;
		$char = $this->character($this->char);

		if($char === '\'') {
			/* U+0022 QUOTATION MARK (')
			Switch to the before attribute name state. */
			$this->state = 'beforeAttributeName';

		} elseif($char === '&') {
			/* U+0026 AMPERSAND (&)
			Switch to the entity in attribute value state. */
			$this->entityInAttributeValueState('single');

		} elseif($this->char === $this->EOF) {
			/* EOF
			Parse error. Emit the current tag token. Reconsume the character
			in the data state. */
			$this->emitToken($this->token);

			$this->char--;
			$this->state = 'data';

		} else {
			/* Anything else
			Append the current input character to the current attribute's value.
			Stay in the attribute value (single-quoted) state. */
			$last = count($this->token['attr']) - 1;
			$this->token['attr'][$last]['value'] .= $char;

			$this->state = 'attributeValueSingleQuoted';
		}
	}

	private function attributeValueUnquotedState() {
		// Consume the next input character:
		$this->char++;
		$char = $this->character($this->char);

		if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
			/* U+0009 CHARACTER TABULATION
			U+000A LINE FEED (LF)
			U+000B LINE TABULATION
			U+000C FORM FEED (FF)
			U+0020 SPACE
			Switch to the before attribute name state. */
			$this->state = 'beforeAttributeName';

		} elseif($char === '&') {
			/* U+0026 AMPERSAND (&)
			Switch to the entity in attribute value state. */
			$this->entityInAttributeValueState();

		} elseif($char === '>') {
			/* U+003E GREATER-THAN SIGN (>)
			Emit the current tag token. Switch to the data state. */
			$this->emitToken($this->token);
			$this->state = 'data';

		} else {
			/* Anything else
			Append the current input character to the current attribute's value.
			Stay in the attribute value (unquoted) state. */
			$last = count($this->token['attr']) - 1;
			$this->token['attr'][$last]['value'] .= $char;

			$this->state = 'attributeValueUnquoted';
		}
	}

	private function entityInAttributeValueState() {
		// Attempt to consume an entity.
		$entity = $this->entity();

		// If nothing is returned, append a U+0026 AMPERSAND character to the
		// current attribute's value. Otherwise, emit the character token that
		// was returned.
		$char = (!$entity)
			? '&'
			: $entity;

		$last = count($this->token['attr']) - 1;
		$this->token['attr'][$last]['value'] .= $char;
	}

	private function bogusCommentState() {
		/* Consume every character up to the first U+003E GREATER-THAN SIGN
		character (>) or the end of the file (EOF), whichever comes first. Emit
		a comment token whose data is the concatenation of all the characters
		starting from and including the character that caused the state machine
		to switch into the bogus comment state, up to and including the last
		consumed character before the U+003E character, if any, or up to the
		end of the file otherwise. (If the comment was started by the end of
		the file (EOF), the token is empty.) */
		$data = $this->characters('^>', $this->char);
		$this->emitToken(array(
			'data' => $data,
			'type' => self::COMMENT
		));

		$this->char += strlen($data);

		/* Switch to the data state. */
		$this->state = 'data';

		/* If the end of the file was reached, reconsume the EOF character. */
		if($this->char === $this->EOF) {
			$this->char = $this->EOF - 1;
		}
	}

	private function markupDeclarationOpenState() {
		/* If the next two characters are both U+002D HYPHEN-MINUS (-)
		characters, consume those two characters, create a comment token whose
		data is the empty string, and switch to the comment state. */
		if($this->character($this->char + 1, 2) === '--') {
			$this->char += 2;
			$this->state = 'comment';
			$this->token = array(
				'data' => null,
				'type' => self::COMMENT
			);

		/* Otherwise if the next seven chacacters are a case-insensitive match
		for the word "DOCTYPE", then consume those characters and switch to the
		DOCTYPE state. */
		} elseif(strtolower($this->character($this->char + 1, 7)) === 'doctype') {
			$this->char += 7;
			$this->state = 'doctype';

		/* Otherwise, is is a parse error. Switch to the bogus comment state.
		The next character that is consumed, if any, is the first character
		that will be in the comment. */
		} else {
			$this->char++;
			$this->state = 'bogusComment';
		}
	}

	private function commentState() {
		/* Consume the next input character: */
		$this->char++;
		$char = $this->char();

		/* U+002D HYPHEN-MINUS (-) */
		if($char === '-') {
			/* Switch to the comment dash state  */
			$this->state = 'commentDash';

		/* EOF */
		} elseif($this->char === $this->EOF) {
			/* Parse error. Emit the comment token. Reconsume the EOF character
			in the data state. */
			$this->emitToken($this->token);
			$this->char--;
			$this->state = 'data';

		/* Anything else */
		} else {
			/* Append the input character to the comment token's data. Stay in
			the comment state. */
			$this->token['data'] .= $char;
		}
	}

	private function commentDashState() {
		/* Consume the next input character: */
		$this->char++;
		$char = $this->char();

		/* U+002D HYPHEN-MINUS (-) */
		if($char === '-') {
			/* Switch to the comment end state  */
			$this->state = 'commentEnd';

		/* EOF */
		} elseif($this->char === $this->EOF) {
			/* Parse error. Emit the comment token. Reconsume the EOF character
			in the data state. */
			$this->emitToken($this->token);
			$this->char--;
			$this->state = 'data';

		/* Anything else */
		} else {
			/* Append a U+002D HYPHEN-MINUS (-) character and the input
			character to the comment token's data. Switch to the comment state. */
			$this->token['data'] .= '-'.$char;
			$this->state = 'comment';
		}
	}

	private function commentEndState() {
		/* Consume the next input character: */
		$this->char++;
		$char = $this->char();

		if($char === '>') {
			$this->emitToken($this->token);
			$this->state = 'data';

		} elseif($char === '-') {
			$this->token['data'] .= '-';

		} elseif($this->char === $this->EOF) {
			$this->emitToken($this->token);
			$this->char--;
			$this->state = 'data';

		} else {
			$this->token['data'] .= '--'.$char;
			$this->state = 'comment';
		}
	}

	private function doctypeState() {
		/* Consume the next input character: */
		$this->char++;
		$char = $this->char();

		if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
			$this->state = 'beforeDoctypeName';

		} else {
			$this->char--;
			$this->state = 'beforeDoctypeName';
		}
	}

	private function beforeDoctypeNameState() {
		/* Consume the next input character: */
		$this->char++;
		$char = $this->char();

		if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
			// Stay in the before DOCTYPE name state.

		} elseif(preg_match('/^[a-z]$/', $char)) {
			$this->token = array(
				'name' => strtoupper($char),
				'type' => self::DOCTYPE,
				'error' => true
			);

			$this->state = 'doctypeName';

		} elseif($char === '>') {
			$this->emitToken(array(
				'name' => null,
				'type' => self::DOCTYPE,
				'error' => true
			));

			$this->state = 'data';

		} elseif($this->char === $this->EOF) {
			$this->emitToken(array(
				'name' => null,
				'type' => self::DOCTYPE,
				'error' => true
			));

			$this->char--;
			$this->state = 'data';

		} else {
			$this->token = array(
				'name' => $char,
				'type' => self::DOCTYPE,
				'error' => true
			);

			$this->state = 'doctypeName';
		}
	}

	private function doctypeNameState() {
		/* Consume the next input character: */
		$this->char++;
		$char = $this->char();

		if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
			$this->state = 'AfterDoctypeName';

		} elseif($char === '>') {
			$this->emitToken($this->token);
			$this->state = 'data';

		} elseif(preg_match('/^[a-z]$/', $char)) {
			$this->token['name'] .= strtoupper($char);

		} elseif($this->char === $this->EOF) {
			$this->emitToken($this->token);
			$this->char--;
			$this->state = 'data';

		} else {
			$this->token['name'] .= $char;
		}

		$this->token['error'] = ($this->token['name'] === 'HTML')
			? false
			: true;
	}

	private function afterDoctypeNameState() {
		/* Consume the next input character: */
		$this->char++;
		$char = $this->char();

		if(preg_match('/^[\t\n\x0b\x0c ]$/', $char)) {
			// Stay in the DOCTYPE name state.

		} elseif($char === '>') {
			$this->emitToken($this->token);
			$this->state = 'data';

		} elseif($this->char === $this->EOF) {
			$this->emitToken($this->token);
			$this->char--;
			$this->state = 'data';

		} else {
			$this->token['error'] = true;
			$this->state = 'bogusDoctype';
		}
	}

	private function bogusDoctypeState() {
		/* Consume the next input character: */
		$this->char++;
		$char = $this->char();

		if($char === '>') {
			$this->emitToken($this->token);
			$this->state = 'data';

		} elseif($this->char === $this->EOF) {
			$this->emitToken($this->token);
			$this->char--;
			$this->state = 'data';

		} else {
			// Stay in the bogus DOCTYPE state.
		}
	}

	private function entity() {
		$start = $this->char;

		// This section defines how to consume an entity. This definition is
		// used when parsing entities in text and in attributes.

		// The behaviour depends on the identity of the next character (the
		// one immediately after the U+0026 AMPERSAND character): 

		switch($this->character($this->char + 1)) {
			// U+0023 NUMBER SIGN (#)
			case '#':

				// The behaviour further depends on the character after the
				// U+0023 NUMBER SIGN:
				switch($this->character($this->char + 1)) {
					// U+0078 LATIN SMALL LETTER X
					// U+0058 LATIN CAPITAL LETTER X
					case 'x':
					case 'X':
						// Follow the steps below, but using the range of
						// characters U+0030 DIGIT ZERO through to U+0039 DIGIT
						// NINE, U+0061 LATIN SMALL LETTER A through to U+0066
						// LATIN SMALL LETTER F, and U+0041 LATIN CAPITAL LETTER
						// A, through to U+0046 LATIN CAPITAL LETTER F (in other
						// words, 0-9, A-F, a-f).
						$char = 1;
						$char_class = '0-9A-Fa-f';
					break;

					// Anything else
					default:
						// Follow the steps below, but using the range of
						// characters U+0030 DIGIT ZERO through to U+0039 DIGIT
						// NINE (i.e. just 0-9).
						$char = 0;
						$char_class = '0-9';
					break;
				}

				// Consume as many characters as match the range of characters
				// given above.
				$this->char++;
				$e_name = $this->characters($char_class, $this->char + $char + 1);
				$entity = $this->character($start, $this->char);
				$cond = strlen($e_name) > 0;

				// The rest of the parsing happens bellow.
			break;

			// Anything else
			default:
				// Consume the maximum number of characters possible, with the
				// consumed characters case-sensitively matching one of the
				// identifiers in the first column of the entities table.
				$e_name = $this->characters('0-9A-Za-z;', $this->char + 1);
				$len = strlen($e_name);

				for($c = 1; $c <= $len; $c++) {
					$id = substr($e_name, 0, $c);
					$this->char++;

					if(in_array($id, $this->entities)) {
						if ($e_name[$c-1] !== ';') {
							if ($c < $len && $e_name[$c] == ';') {
								$this->char++; // consume extra semicolon
							}
						}
						$entity = $id;
						break;
					}
				}

				$cond = isset($entity);
				// The rest of the parsing happens bellow.
			break;
		}

		if(!$cond) {
			// If no match can be made, then this is a parse error. No
			// characters are consumed, and nothing is returned.
			$this->char = $start;
			return false;
		}

		// Return a character token for the character corresponding to the
		// entity name (as given by the second column of the entities table).
		return html_entity_decode('&'.$entity.';', ENT_QUOTES, 'UTF-8');
	}

	private function emitToken($token) {
		$emit = $this->tree->emitToken($token);

		if(is_int($emit)) {
			$this->content_model = $emit;

		} elseif($token['type'] === self::ENDTAG) {
			$this->content_model = self::PCDATA;
		}
	}

	private function EOF() {
		$this->state = null;
		$this->tree->emitToken(array(
			'type' => self::EOF
		));
	}
}

class HTML5TreeConstructer {
	public $stack = array();

	private $phase;
	private $mode;
	private $dom;
	private $foster_parent = null;
	private $a_formatting  = array();

	private $head_pointer = null;
	private $form_pointer = null;

	private $scoping = array('button','caption','html','marquee','object','table','td','th');
	private $formatting = array('a','b','big','em','font','i','nobr','s','small','strike','strong','tt','u');
	private $special = array('address','area','base','basefont','bgsound',
	'blockquote','body','br','center','col','colgroup','dd','dir','div','dl',
	'dt','embed','fieldset','form','frame','frameset','h1','h2','h3','h4','h5',
	'h6','head','hr','iframe','image','img','input','isindex','li','link',
	'listing','menu','meta','noembed','noframes','noscript','ol','optgroup',
	'option','p','param','plaintext','pre','script','select','spacer','style',
	'tbody','textarea','tfoot','thead','title','tr','ul','wbr');

	// The different phases.
	const INIT_PHASE = 0;
	const ROOT_PHASE = 1;
	const MAIN_PHASE = 2;
	const END_PHASE  = 3;

	// The different insertion modes for the main phase.
	const BEFOR_HEAD = 0;
	const IN_HEAD	= 1;
	const AFTER_HEAD = 2;
	const IN_BODY	= 3;
	const IN_TABLE   = 4;
	const IN_CAPTION = 5;
	const IN_CGROUP  = 6;
	const IN_TBODY   = 7;
	const IN_ROW	 = 8;
	const IN_CELL	= 9;
	const IN_SELECT  = 10;
	const AFTER_BODY = 11;
	const IN_FRAME   = 12;
	const AFTR_FRAME = 13;

	// The different types of elements.
	const SPECIAL	= 0;
	const SCOPING	= 1;
	const FORMATTING = 2;
	const PHRASING   = 3;

	const MARKER	 = 0;

	public function __construct() {
		$this->phase = self::INIT_PHASE;
		$this->mode = self::BEFOR_HEAD;
		$this->dom = new DOMDocument;

		$this->dom->encoding = 'UTF-8';
		$this->dom->preserveWhiteSpace = true;
		$this->dom->substituteEntities = true;
		$this->dom->strictErrorChecking = false;
	}

	// Process tag tokens
	public function emitToken($token) {
		switch($this->phase) {
			case self::INIT_PHASE: return $this->initPhase($token); break;
			case self::ROOT_PHASE: return $this->rootElementPhase($token); break;
			case self::MAIN_PHASE: return $this->mainPhase($token); break;
			case self::END_PHASE : return $this->trailingEndPhase($token); break;
		}
	}

	private function initPhase($token) {
		/* Initially, the tree construction stage must handle each token
		emitted from the tokenisation stage as follows: */

		/* A DOCTYPE token that is marked as being in error
		A comment token
		A start tag token
		An end tag token
		A character token that is not one of one of U+0009 CHARACTER TABULATION,
			U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
			or U+0020 SPACE
		An end-of-file token */
		if((isset($token['error']) && $token['error']) ||
		$token['type'] === HTML5::COMMENT ||
		$token['type'] === HTML5::STARTTAG ||
		$token['type'] === HTML5::ENDTAG ||
		$token['type'] === HTML5::EOF ||
		($token['type'] === HTML5::CHARACTR && isset($token['data']) &&
		!preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data']))) {
			/* This specification does not define how to handle this case. In
			particular, user agents may ignore the entirety of this specification
			altogether for such documents, and instead invoke special parse modes
			with a greater emphasis on backwards compatibility. */

			$this->phase = self::ROOT_PHASE;
			return $this->rootElementPhase($token);

		/* A DOCTYPE token marked as being correct */
		} elseif(isset($token['error']) && !$token['error']) {
			/* Append a DocumentType node to the Document  node, with the name
			attribute set to the name given in the DOCTYPE token (which will be
			"HTML"), and the other attributes specific to DocumentType objects
			set to null, empty lists, or the empty string as appropriate. */
			$doctype = new DOMDocumentType(null, null, 'HTML');

			/* Then, switch to the root element phase of the tree construction
			stage. */
			$this->phase = self::ROOT_PHASE;

		/* A character token that is one of one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		or U+0020 SPACE */
		} elseif(isset($token['data']) && preg_match('/^[\t\n\x0b\x0c ]+$/',
		$token['data'])) {
			/* Append that character  to the Document node. */
			$text = $this->dom->createTextNode($token['data']);
			$this->dom->appendChild($text);
		}
	}

	private function rootElementPhase($token) {
		/* After the initial phase, as each token is emitted from the tokenisation
		stage, it must be processed as described in this section. */

		/* A DOCTYPE token */
		if($token['type'] === HTML5::DOCTYPE) {
			// Parse error. Ignore the token.

		/* A comment token */
		} elseif($token['type'] === HTML5::COMMENT) {
			/* Append a Comment node to the Document object with the data
			attribute set to the data given in the comment token. */
			$comment = $this->dom->createComment($token['data']);
			$this->dom->appendChild($comment);

		/* A character token that is one of one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		or U+0020 SPACE */
		} elseif($token['type'] === HTML5::CHARACTR &&
		preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
			/* Append that character  to the Document node. */
			$text = $this->dom->createTextNode($token['data']);
			$this->dom->appendChild($text);

		/* A character token that is not one of U+0009 CHARACTER TABULATION,
			U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED
			(FF), or U+0020 SPACE
		A start tag token
		An end tag token
		An end-of-file token */
		} elseif(($token['type'] === HTML5::CHARACTR &&
		!preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) ||
		$token['type'] === HTML5::STARTTAG ||
		$token['type'] === HTML5::ENDTAG ||
		$token['type'] === HTML5::EOF) {
			/* Create an HTMLElement node with the tag name html, in the HTML
			namespace. Append it to the Document object. Switch to the main
			phase and reprocess the current token. */
			$html = $this->dom->createElement('html');
			$this->dom->appendChild($html);
			$this->stack[] = $html;

			$this->phase = self::MAIN_PHASE;
			return $this->mainPhase($token);
		}
	}

	private function mainPhase($token) {
		/* Tokens in the main phase must be handled as follows: */

		/* A DOCTYPE token */
		if($token['type'] === HTML5::DOCTYPE) {
			// Parse error. Ignore the token.

		/* A start tag token with the tag name "html" */
		} elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'html') {
			/* If this start tag token was not the first start tag token, then
			it is a parse error. */

			/* For each attribute on the token, check to see if the attribute
			is already present on the top element of the stack of open elements.
			If it is not, add the attribute and its corresponding value to that
			element. */
			foreach($token['attr'] as $attr) {
				if(!$this->stack[0]->hasAttribute($attr['name'])) {
					$this->stack[0]->setAttribute($attr['name'], $attr['value']);
				}
			}

		/* An end-of-file token */
		} elseif($token['type'] === HTML5::EOF) {
			/* Generate implied end tags. */
			$this->generateImpliedEndTags();

		/* Anything else. */
		} else {
			/* Depends on the insertion mode: */
			switch($this->mode) {
				case self::BEFOR_HEAD: return $this->beforeHead($token); break;
				case self::IN_HEAD:	return $this->inHead($token); break;
				case self::AFTER_HEAD: return $this->afterHead($token); break;
				case self::IN_BODY:	return $this->inBody($token); break;
				case self::IN_TABLE:   return $this->inTable($token); break;
				case self::IN_CAPTION: return $this->inCaption($token); break;
				case self::IN_CGROUP:  return $this->inColumnGroup($token); break;
				case self::IN_TBODY:   return $this->inTableBody($token); break;
				case self::IN_ROW:	 return $this->inRow($token); break;
				case self::IN_CELL:	return $this->inCell($token); break;
				case self::IN_SELECT:  return $this->inSelect($token); break;
				case self::AFTER_BODY: return $this->afterBody($token); break;
				case self::IN_FRAME:   return $this->inFrameset($token); break;
				case self::AFTR_FRAME: return $this->afterFrameset($token); break;
				case self::END_PHASE:  return $this->trailingEndPhase($token); break;
			}
		}
	}

	private function beforeHead($token) {
		/* Handle the token as follows: */

		/* A character token that is one of one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		or U+0020 SPACE */
		if($token['type'] === HTML5::CHARACTR &&
		preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
			/* Append the character to the current node. */
			$this->insertText($token['data']);

		/* A comment token */
		} elseif($token['type'] === HTML5::COMMENT) {
			/* Append a Comment node to the current node with the data attribute
			set to the data given in the comment token. */
			$this->insertComment($token['data']);

		/* A start tag token with the tag name "head" */
		} elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'head') {
			/* Create an element for the token, append the new element to the
			current node and push it onto the stack of open elements. */
			$element = $this->insertElement($token);

			/* Set the head element pointer to this new element node. */
			$this->head_pointer = $element;

			/* Change the insertion mode to "in head". */
			$this->mode = self::IN_HEAD;

		/* A start tag token whose tag name is one of: "base", "link", "meta",
		"script", "style", "title". Or an end tag with the tag name "html".
		Or a character token that is not one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		or U+0020 SPACE. Or any other start tag token */
		} elseif($token['type'] === HTML5::STARTTAG ||
		($token['type'] === HTML5::ENDTAG && $token['name'] === 'html') ||
		($token['type'] === HTML5::CHARACTR && !preg_match('/^[\t\n\x0b\x0c ]$/',
		$token['data']))) {
			/* Act as if a start tag token with the tag name "head" and no
			attributes had been seen, then reprocess the current token. */
			$this->beforeHead(array(
				'name' => 'head',
				'type' => HTML5::STARTTAG,
				'attr' => array()
			));

			return $this->inHead($token);

		/* Any other end tag */
		} elseif($token['type'] === HTML5::ENDTAG) {
			/* Parse error. Ignore the token. */
		}
	}

	private function inHead($token) {
		/* Handle the token as follows: */

		/* A character token that is one of one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		or U+0020 SPACE.

		THIS DIFFERS FROM THE SPEC: If the current node is either a title, style
		or script element, append the character to the current node regardless
		of its content. */
		if(($token['type'] === HTML5::CHARACTR &&
		preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) || (
		$token['type'] === HTML5::CHARACTR && in_array(end($this->stack)->nodeName,
		array('title', 'style', 'script')))) {
			/* Append the character to the current node. */
			$this->insertText($token['data']);

		/* A comment token */
		} elseif($token['type'] === HTML5::COMMENT) {
			/* Append a Comment node to the current node with the data attribute
			set to the data given in the comment token. */
			$this->insertComment($token['data']);

		} elseif($token['type'] === HTML5::ENDTAG &&
		in_array($token['name'], array('title', 'style', 'script'))) {
			array_pop($this->stack);
			return HTML5::PCDATA;

		/* A start tag with the tag name "title" */
		} elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'title') {
			/* Create an element for the token and append the new element to the
			node pointed to by the head element pointer, or, if that is null
			(innerHTML case), to the current node. */
			if($this->head_pointer !== null) {
				$element = $this->insertElement($token, false);
				$this->head_pointer->appendChild($element);

			} else {
				$element = $this->insertElement($token);
			}

			/* Switch the tokeniser's content model flag  to the RCDATA state. */
			return HTML5::RCDATA;

		/* A start tag with the tag name "style" */
		} elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'style') {
			/* Create an element for the token and append the new element to the
			node pointed to by the head element pointer, or, if that is null
			(innerHTML case), to the current node. */
			if($this->head_pointer !== null) {
				$element = $this->insertElement($token, false);
				$this->head_pointer->appendChild($element);

			} else {
				$this->insertElement($token);
			}

			/* Switch the tokeniser's content model flag  to the CDATA state. */
			return HTML5::CDATA;

		/* A start tag with the tag name "script" */
		} elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'script') {
			/* Create an element for the token. */
			$element = $this->insertElement($token, false);
			$this->head_pointer->appendChild($element);

			/* Switch the tokeniser's content model flag  to the CDATA state. */
			return HTML5::CDATA;

		/* A start tag with the tag name "base", "link", or "meta" */
		} elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
		array('base', 'link', 'meta'))) {
			/* Create an element for the token and append the new element to the
			node pointed to by the head element pointer, or, if that is null
			(innerHTML case), to the current node. */
			if($this->head_pointer !== null) {
				$element = $this->insertElement($token, false);
				$this->head_pointer->appendChild($element);
				array_pop($this->stack);

			} else {
				$this->insertElement($token);
			}

		/* An end tag with the tag name "head" */
		} elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'head') {
			/* If the current node is a head element, pop the current node off
			the stack of open elements. */
			if($this->head_pointer->isSameNode(end($this->stack))) {
				array_pop($this->stack);

			/* Otherwise, this is a parse error. */
			} else {
				// k
			}

			/* Change the insertion mode to "after head". */
			$this->mode = self::AFTER_HEAD;

		/* A start tag with the tag name "head" or an end tag except "html". */
		} elseif(($token['type'] === HTML5::STARTTAG && $token['name'] === 'head') ||
		($token['type'] === HTML5::ENDTAG && $token['name'] !== 'html')) {
			// Parse error. Ignore the token.

		/* Anything else */
		} else {
			/* If the current node is a head element, act as if an end tag
			token with the tag name "head" had been seen. */
			if($this->head_pointer->isSameNode(end($this->stack))) {
				$this->inHead(array(
					'name' => 'head',
					'type' => HTML5::ENDTAG
				));

			/* Otherwise, change the insertion mode to "after head". */
			} else {
				$this->mode = self::AFTER_HEAD;
			}

			/* Then, reprocess the current token. */
			return $this->afterHead($token);
		}
	}

	private function afterHead($token) {
		/* Handle the token as follows: */

		/* A character token that is one of one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		or U+0020 SPACE */
		if($token['type'] === HTML5::CHARACTR &&
		preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
			/* Append the character to the current node. */
			$this->insertText($token['data']);

		/* A comment token */
		} elseif($token['type'] === HTML5::COMMENT) {
			/* Append a Comment node to the current node with the data attribute
			set to the data given in the comment token. */
			$this->insertComment($token['data']);

		/* A start tag token with the tag name "body" */
		} elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'body') {
			/* Insert a body element for the token. */
			$this->insertElement($token);

			/* Change the insertion mode to "in body". */
			$this->mode = self::IN_BODY;

		/* A start tag token with the tag name "frameset" */
		} elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'frameset') {
			/* Insert a frameset element for the token. */
			$this->insertElement($token);

			/* Change the insertion mode to "in frameset". */
			$this->mode = self::IN_FRAME;

		/* A start tag token whose tag name is one of: "base", "link", "meta",
		"script", "style", "title" */
		} elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
		array('base', 'link', 'meta', 'script', 'style', 'title'))) {
			/* Parse error. Switch the insertion mode back to "in head" and
			reprocess the token. */
			$this->mode = self::IN_HEAD;
			return $this->inHead($token);

		/* Anything else */
		} else {
			/* Act as if a start tag token with the tag name "body" and no
			attributes had been seen, and then reprocess the current token. */
			$this->afterHead(array(
				'name' => 'body',
				'type' => HTML5::STARTTAG,
				'attr' => array()
			));

			return $this->inBody($token);
		}
	}

	private function inBody($token) {
		/* Handle the token as follows: */

		switch($token['type']) {
			/* A character token */
			case HTML5::CHARACTR:
				/* Reconstruct the active formatting elements, if any. */
				$this->reconstructActiveFormattingElements();

				/* Append the token's character to the current node. */
				$this->insertText($token['data']);
			break;

			/* A comment token */
			case HTML5::COMMENT:
				/* Append a Comment node to the current node with the data
				attribute set to the data given in the comment token. */
				$this->insertComment($token['data']);
			break;

			case HTML5::STARTTAG:
			switch($token['name']) {
				/* A start tag token whose tag name is one of: "script",
				"style" */
				case 'script': case 'style':
					/* Process the token as if the insertion mode had been "in
					head". */
					return $this->inHead($token);
				break;

				/* A start tag token whose tag name is one of: "base", "link",
				"meta", "title" */
				case 'base': case 'link': case 'meta': case 'title':
					/* Parse error. Process the token as if the insertion mode
					had	been "in head". */
					return $this->inHead($token);
				break;

				/* A start tag token with the tag name "body" */
				case 'body':
					/* Parse error. If the second element on the stack of open
					elements is not a body element, or, if the stack of open
					elements has only one node on it, then ignore the token.
					(innerHTML case) */
					if(count($this->stack) === 1 || $this->stack[1]->nodeName !== 'body') {
						// Ignore

					/* Otherwise, for each attribute on the token, check to see
					if the attribute is already present on the body element (the
					second element)	on the stack of open elements. If it is not,
					add the attribute and its corresponding value to that
					element. */
					} else {
						foreach($token['attr'] as $attr) {
							if(!$this->stack[1]->hasAttribute($attr['name'])) {
								$this->stack[1]->setAttribute($attr['name'], $attr['value']);
							}
						}
					}
				break;

				/* A start tag whose tag name is one of: "address",
				"blockquote", "center", "dir", "div", "dl", "fieldset",
				"listing", "menu", "ol", "p", "ul" */
				case 'address': case 'blockquote': case 'center': case 'dir':
				case 'div': case 'dl': case 'fieldset': case 'listing':
				case 'menu': case 'ol': case 'p': case 'ul':
					/* If the stack of open elements has a p element in scope,
					then act as if an end tag with the tag name p had been
					seen. */
					if($this->elementInScope('p')) {
						$this->emitToken(array(
							'name' => 'p',
							'type' => HTML5::ENDTAG
						));
					}

					/* Insert an HTML element for the token. */
					$this->insertElement($token);
				break;

				/* A start tag whose tag name is "form" */
				case 'form':
					/* If the form element pointer is not null, ignore the
					token with a parse error. */
					if($this->form_pointer !== null) {
						// Ignore.

					/* Otherwise: */
					} else {
						/* If the stack of open elements has a p element in
						scope, then act as if an end tag with the tag name p
						had been seen. */
						if($this->elementInScope('p')) {
							$this->emitToken(array(
								'name' => 'p',
								'type' => HTML5::ENDTAG
							));
						}

						/* Insert an HTML element for the token, and set the
						form element pointer to point to the element created. */
						$element = $this->insertElement($token);
						$this->form_pointer = $element;
					}
				break;

				/* A start tag whose tag name is "li", "dd" or "dt" */
				case 'li': case 'dd': case 'dt':
					/* If the stack of open elements has a p  element in scope,
					then act as if an end tag with the tag name p had been
					seen. */
					if($this->elementInScope('p')) {
						$this->emitToken(array(
							'name' => 'p',
							'type' => HTML5::ENDTAG
						));
					}

					$stack_length = count($this->stack) - 1;

					for($n = $stack_length; 0 <= $n; $n--) {
						/* 1. Initialise node to be the current node (the
						bottommost node of the stack). */
						$stop = false;
						$node = $this->stack[$n];
						$cat  = $this->getElementCategory($node->tagName);

						/* 2. If node is an li, dd or dt element, then pop all
						the	nodes from the current node up to node, including
						node, then stop this algorithm. */
						if($token['name'] === $node->tagName ||	($token['name'] !== 'li'
						&& ($node->tagName === 'dd' || $node->tagName === 'dt'))) {
							for($x = $stack_length; $x >= $n ; $x--) {
								array_pop($this->stack);
							}

							break;
						}

						/* 3. If node is not in the formatting category, and is
						not	in the phrasing category, and is not an address or
						div element, then stop this algorithm. */
						if($cat !== self::FORMATTING && $cat !== self::PHRASING &&
						$node->tagName !== 'address' && $node->tagName !== 'div') {
							break;
						}
					}

					/* Finally, insert an HTML element with the same tag
					name as the	token's. */
					$this->insertElement($token);
				break;

				/* A start tag token whose tag name is "plaintext" */
				case 'plaintext':
					/* If the stack of open elements has a p  element in scope,
					then act as if an end tag with the tag name p had been
					seen. */
					if($this->elementInScope('p')) {
						$this->emitToken(array(
							'name' => 'p',
							'type' => HTML5::ENDTAG
						));
					}

					/* Insert an HTML element for the token. */
					$this->insertElement($token);

					return HTML5::PLAINTEXT;
				break;

				/* A start tag whose tag name is one of: "h1", "h2", "h3", "h4",
				"h5", "h6" */
				case 'h1': case 'h2': case 'h3': case 'h4': case 'h5': case 'h6':
					/* If the stack of open elements has a p  element in scope,
					then act as if an end tag with the tag name p had been seen. */
					if($this->elementInScope('p')) {
						$this->emitToken(array(
							'name' => 'p',
							'type' => HTML5::ENDTAG
						));
					}

					/* If the stack of open elements has in scope an element whose
					tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", then
					this is a parse error; pop elements from the stack until an
					element with one of those tag names has been popped from the
					stack. */
					while($this->elementInScope(array('h1', 'h2', 'h3', 'h4', 'h5', 'h6'))) {
						array_pop($this->stack);
					}

					/* Insert an HTML element for the token. */
					$this->insertElement($token);
				break;

				/* A start tag whose tag name is "a" */
				case 'a':
					/* If the list of active formatting elements contains
					an element whose tag name is "a" between the end of the
					list and the last marker on the list (or the start of
					the list if there is no marker on the list), then this
					is a parse error; act as if an end tag with the tag name
					"a" had been seen, then remove that element from the list
					of active formatting elements and the stack of open
					elements if the end tag didn't already remove it (it
					might not have if the element is not in table scope). */
					$leng = count($this->a_formatting);

					for($n = $leng - 1; $n >= 0; $n--) {
						if($this->a_formatting[$n] === self::MARKER) {
							break;

						} elseif($this->a_formatting[$n]->nodeName === 'a') {
							$this->emitToken(array(
								'name' => 'a',
								'type' => HTML5::ENDTAG
							));
							break;
						}
					}

					/* Reconstruct the active formatting elements, if any. */
					$this->reconstructActiveFormattingElements();

					/* Insert an HTML element for the token. */
					$el = $this->insertElement($token);

					/* Add that element to the list of active formatting
					elements. */
					$this->a_formatting[] = $el;
				break;

				/* A start tag whose tag name is one of: "b", "big", "em", "font",
				"i", "nobr", "s", "small", "strike", "strong", "tt", "u" */
				case 'b': case 'big': case 'em': case 'font': case 'i':
				case 'nobr': case 's': case 'small': case 'strike':
				case 'strong': case 'tt': case 'u':
					/* Reconstruct the active formatting elements, if any. */
					$this->reconstructActiveFormattingElements();

					/* Insert an HTML element for the token. */
					$el = $this->insertElement($token);

					/* Add that element to the list of active formatting
					elements. */
					$this->a_formatting[] = $el;
				break;

				/* A start tag token whose tag name is "button" */
				case 'button':
					/* If the stack of open elements has a button element in scope,
					then this is a parse error; act as if an end tag with the tag
					name "button" had been seen, then reprocess the token. (We don't
					do that. Unnecessary.) */
					if($this->elementInScope('button')) {
						$this->inBody(array(
							'name' => 'button',
							'type' => HTML5::ENDTAG
						));
					}

					/* Reconstruct the active formatting elements, if any. */
					$this->reconstructActiveFormattingElements();

					/* Insert an HTML element for the token. */
					$this->insertElement($token);

					/* Insert a marker at the end of the list of active
					formatting elements. */
					$this->a_formatting[] = self::MARKER;
				break;

				/* A start tag token whose tag name is one of: "marquee", "object" */
				case 'marquee': case 'object':
					/* Reconstruct the active formatting elements, if any. */
					$this->reconstructActiveFormattingElements();

					/* Insert an HTML element for the token. */
					$this->insertElement($token);

					/* Insert a marker at the end of the list of active
					formatting elements. */
					$this->a_formatting[] = self::MARKER;
				break;

				/* A start tag token whose tag name is "xmp" */
				case 'xmp':
					/* Reconstruct the active formatting elements, if any. */
					$this->reconstructActiveFormattingElements();

					/* Insert an HTML element for the token. */
					$this->insertElement($token);

					/* Switch the content model flag to the CDATA state. */
					return HTML5::CDATA;
				break;

				/* A start tag whose tag name is "table" */
				case 'table':
					/* If the stack of open elements has a p element in scope,
					then act as if an end tag with the tag name p had been seen. */
					if($this->elementInScope('p')) {
						$this->emitToken(array(
							'name' => 'p',
							'type' => HTML5::ENDTAG
						));
					}

					/* Insert an HTML element for the token. */
					$this->insertElement($token);

					/* Change the insertion mode to "in table". */
					$this->mode = self::IN_TABLE;
				break;

				/* A start tag whose tag name is one of: "area", "basefont",
				"bgsound", "br", "embed", "img", "param", "spacer", "wbr" */
				case 'area': case 'basefont': case 'bgsound': case 'br':
				case 'embed': case 'img': case 'param': case 'spacer':
				case 'wbr':
					/* Reconstruct the active formatting elements, if any. */
					$this->reconstructActiveFormattingElements();

					/* Insert an HTML element for the token. */
					$this->insertElement($token);

					/* Immediately pop the current node off the stack of open elements. */
					array_pop($this->stack);
				break;

				/* A start tag whose tag name is "hr" */
				case 'hr':
					/* If the stack of open elements has a p element in scope,
					then act as if an end tag with the tag name p had been seen. */
					if($this->elementInScope('p')) {
						$this->emitToken(array(
							'name' => 'p',
							'type' => HTML5::ENDTAG
						));
					}

					/* Insert an HTML element for the token. */
					$this->insertElement($token);

					/* Immediately pop the current node off the stack of open elements. */
					array_pop($this->stack);
				break;

				/* A start tag whose tag name is "image" */
				case 'image':
					/* Parse error. Change the token's tag name to "img" and
					reprocess it. (Don't ask.) */
					$token['name'] = 'img';
					return $this->inBody($token);
				break;

				/* A start tag whose tag name is "input" */
				case 'input':
					/* Reconstruct the active formatting elements, if any. */
					$this->reconstructActiveFormattingElements();

					/* Insert an input element for the token. */
					$element = $this->insertElement($token, false);

					/* If the form element pointer is not null, then associate the
					input element with the form element pointed to by the form
					element pointer. */
					$this->form_pointer !== null
						? $this->form_pointer->appendChild($element)
						: end($this->stack)->appendChild($element);

					/* Pop that input element off the stack of open elements. */
					array_pop($this->stack);
				break;

				/* A start tag whose tag name is "isindex" */
				case 'isindex':
					/* Parse error. */
					// w/e

					/* If the form element pointer is not null,
					then ignore the token. */
					if($this->form_pointer === null) {
						/* Act as if a start tag token with the tag name "form" had
						been seen. */
						$this->inBody(array(
							'name' => 'body',
							'type' => HTML5::STARTTAG,
							'attr' => array()
						));

						/* Act as if a start tag token with the tag name "hr" had
						been seen. */
						$this->inBody(array(
							'name' => 'hr',
							'type' => HTML5::STARTTAG,
							'attr' => array()
						));

						/* Act as if a start tag token with the tag name "p" had
						been seen. */
						$this->inBody(array(
							'name' => 'p',
							'type' => HTML5::STARTTAG,
							'attr' => array()
						));

						/* Act as if a start tag token with the tag name "label"
						had been seen. */
						$this->inBody(array(
							'name' => 'label',
							'type' => HTML5::STARTTAG,
							'attr' => array()
						));

						/* Act as if a stream of character tokens had been seen. */
						$this->insertText('This is a searchable index. '.
						'Insert your search keywords here: ');

						/* Act as if a start tag token with the tag name "input"
						had been seen, with all the attributes from the "isindex"
						token, except with the "name" attribute set to the value
						"isindex" (ignoring any explicit "name" attribute). */
						$attr = $token['attr'];
						$attr[] = array('name' => 'name', 'value' => 'isindex');

						$this->inBody(array(
							'name' => 'input',
							'type' => HTML5::STARTTAG,
							'attr' => $attr
						));

						/* Act as if a stream of character tokens had been seen
						(see below for what they should say). */
						$this->insertText('This is a searchable index. '.
						'Insert your search keywords here: ');

						/* Act as if an end tag token with the tag name "label"
						had been seen. */
						$this->inBody(array(
							'name' => 'label',
							'type' => HTML5::ENDTAG
						));

						/* Act as if an end tag token with the tag name "p" had
						been seen. */
						$this->inBody(array(
							'name' => 'p',
							'type' => HTML5::ENDTAG
						));

						/* Act as if a start tag token with the tag name "hr" had
						been seen. */
						$this->inBody(array(
							'name' => 'hr',
							'type' => HTML5::ENDTAG
						));

						/* Act as if an end tag token with the tag name "form" had
						been seen. */
						$this->inBody(array(
							'name' => 'form',
							'type' => HTML5::ENDTAG
						));
					}
				break;

				/* A start tag whose tag name is "textarea" */
				case 'textarea':
					$this->insertElement($token);

					/* Switch the tokeniser's content model flag to the
					RCDATA state. */
					return HTML5::RCDATA;
				break;

				/* A start tag whose tag name is one of: "iframe", "noembed",
				"noframes" */
				case 'iframe': case 'noembed': case 'noframes':
					$this->insertElement($token);

					/* Switch the tokeniser's content model flag to the CDATA state. */
					return HTML5::CDATA;
				break;

				/* A start tag whose tag name is "select" */
				case 'select':
					/* Reconstruct the active formatting elements, if any. */
					$this->reconstructActiveFormattingElements();

					/* Insert an HTML element for the token. */
					$this->insertElement($token);

					/* Change the insertion mode to "in select". */
					$this->mode = self::IN_SELECT;
				break;

				/* A start or end tag whose tag name is one of: "caption", "col",
				"colgroup", "frame", "frameset", "head", "option", "optgroup",
				"tbody", "td", "tfoot", "th", "thead", "tr". */
				case 'caption': case 'col': case 'colgroup': case 'frame':
				case 'frameset': case 'head': case 'option': case 'optgroup':
				case 'tbody': case 'td': case 'tfoot': case 'th': case 'thead':
				case 'tr':
					// Parse error. Ignore the token.
				break;

				/* A start or end tag whose tag name is one of: "event-source",
				"section", "nav", "article", "aside", "header", "footer",
				"datagrid", "command" */
				case 'event-source': case 'section': case 'nav': case 'article':
				case 'aside': case 'header': case 'footer': case 'datagrid':
				case 'command':
					// Work in progress!
				break;

				/* A start tag token not covered by the previous entries */
				default:
					/* Reconstruct the active formatting elements, if any. */
					$this->reconstructActiveFormattingElements();

					$this->insertElement($token);
				break;
			}
			break;

			case HTML5::ENDTAG:
			switch($token['name']) {
				/* An end tag with the tag name "body" */
				case 'body':
					/* If the second element in the stack of open elements is
					not a body element, this is a parse error. Ignore the token.
					(innerHTML case) */
					if(count($this->stack) < 2 || $this->stack[1]->nodeName !== 'body') {
						// Ignore.

					/* If the current node is not the body element, then this
					is a parse error. */
					} elseif(end($this->stack)->nodeName !== 'body') {
						// Parse error.
					}

					/* Change the insertion mode to "after body". */
					$this->mode = self::AFTER_BODY;
				break;

				/* An end tag with the tag name "html" */
				case 'html':
					/* Act as if an end tag with tag name "body" had been seen,
					then, if that token wasn't ignored, reprocess the current
					token. */
					$this->inBody(array(
						'name' => 'body',
						'type' => HTML5::ENDTAG
					));

					return $this->afterBody($token);
				break;

				/* An end tag whose tag name is one of: "address", "blockquote",
				"center", "dir", "div", "dl", "fieldset", "listing", "menu",
				"ol", "pre", "ul" */
				case 'address': case 'blockquote': case 'center': case 'dir':
				case 'div': case 'dl': case 'fieldset': case 'listing':
				case 'menu': case 'ol': case 'pre': case 'ul':
					/* If the stack of open elements has an element in scope
					with the same tag name as that of the token, then generate
					implied end tags. */
					if($this->elementInScope($token['name'])) {
						$this->generateImpliedEndTags();

						/* Now, if the current node is not an element with
						the same tag name as that of the token, then this
						is a parse error. */
						// w/e

						/* If the stack of open elements has an element in
						scope with the same tag name as that of the token,
						then pop elements from this stack until an element
						with that tag name has been popped from the stack. */
						for($n = count($this->stack) - 1; $n >= 0; $n--) {
							if($this->stack[$n]->nodeName === $token['name']) {
								$n = -1;
							}

							array_pop($this->stack);
						}
					}
				break;

				/* An end tag whose tag name is "form" */
				case 'form':
					/* If the stack of open elements has an element in scope
					with the same tag name as that of the token, then generate
					implied	end tags. */
					if($this->elementInScope($token['name'])) {
						$this->generateImpliedEndTags();

					} 

					if(end($this->stack)->nodeName !== $token['name']) {
						/* Now, if the current node is not an element with the
						same tag name as that of the token, then this is a parse
						error. */
						// w/e

					} else {
						/* Otherwise, if the current node is an element with
						the same tag name as that of the token pop that element
						from the stack. */
						array_pop($this->stack);
					}

					/* In any case, set the form element pointer to null. */
					$this->form_pointer = null;
				break;

				/* An end tag whose tag name is "p" */
				case 'p':
					/* If the stack of open elements has a p element in scope,
					then generate implied end tags, except for p elements. */
					if($this->elementInScope('p')) {
						$this->generateImpliedEndTags(array('p'));

						/* If the current node is not a p element, then this is
						a parse error. */
						// k

						/* If the stack of open elements has a p element in
						scope, then pop elements from this stack until the stack
						no longer has a p element in scope. */
						for($n = count($this->stack) - 1; $n >= 0; $n--) {
							if($this->elementInScope('p')) {
								array_pop($this->stack);

							} else {
								break;
							}
						}
					}
				break;

				/* An end tag whose tag name is "dd", "dt", or "li" */
				case 'dd': case 'dt': case 'li':
					/* If the stack of open elements has an element in scope
					whose tag name matches the tag name of the token, then
					generate implied end tags, except for elements with the
					same tag name as the token. */
					if($this->elementInScope($token['name'])) {
						$this->generateImpliedEndTags(array($token['name']));

						/* If the current node is not an element with the same
						tag name as the token, then this is a parse error. */
						// w/e

						/* If the stack of open elements has an element in scope
						whose tag name matches the tag name of the token, then
						pop elements from this stack until an element with that
						tag name has been popped from the stack. */
						for($n = count($this->stack) - 1; $n >= 0; $n--) {
							if($this->stack[$n]->nodeName === $token['name']) {
								$n = -1;
							}

							array_pop($this->stack);
						}
					}
				break;

				/* An end tag whose tag name is one of: "h1", "h2", "h3", "h4",
				"h5", "h6" */
				case 'h1': case 'h2': case 'h3': case 'h4': case 'h5': case 'h6':
					$elements = array('h1', 'h2', 'h3', 'h4', 'h5', 'h6');

					/* If the stack of open elements has in scope an element whose
					tag name is one of "h1", "h2", "h3", "h4", "h5", or "h6", then
					generate implied end tags. */
					if($this->elementInScope($elements)) {
						$this->generateImpliedEndTags();

						/* Now, if the current node is not an element with the same
						tag name as that of the token, then this is a parse error. */
						// w/e

						/* If the stack of open elements has in scope an element
						whose tag name is one of "h1", "h2", "h3", "h4", "h5", or
						"h6", then pop elements from the stack until an element
						with one of those tag names has been popped from the stack. */
						while($this->elementInScope($elements)) {
							array_pop($this->stack);
						}
					}
				break;

				/* An end tag whose tag name is one of: "a", "b", "big", "em",
				"font", "i", "nobr", "s", "small", "strike", "strong", "tt", "u" */
				case 'a': case 'b': case 'big': case 'em': case 'font':
				case 'i': case 'nobr': case 's': case 'small': case 'strike':
				case 'strong': case 'tt': case 'u':
					/* 1. Let the formatting element be the last element in
					the list of active formatting elements that:
						* is between the end of the list and the last scope
						marker in the list, if any, or the start of the list
						otherwise, and
						* has the same tag name as the token.
					*/
					while(true) {
						for($a = count($this->a_formatting) - 1; $a >= 0; $a--) {
							if($this->a_formatting[$a] === self::MARKER) {
								break;

							} elseif($this->a_formatting[$a]->tagName === $token['name']) {
								$formatting_element = $this->a_formatting[$a];
								$in_stack = in_array($formatting_element, $this->stack, true);
								$fe_af_pos = $a;
								break;
							}
						}

						/* If there is no such node, or, if that node is
						also in the stack of open elements but the element
						is not in scope, then this is a parse error. Abort
						these steps. The token is ignored. */
						if(!isset($formatting_element) || ($in_stack &&
						!$this->elementInScope($token['name']))) {
							break;

						/* Otherwise, if there is such a node, but that node
						is not in the stack of open elements, then this is a
						parse error; remove the element from the list, and
						abort these steps. */
						} elseif(isset($formatting_element) && !$in_stack) {
							unset($this->a_formatting[$fe_af_pos]);
							$this->a_formatting = array_merge($this->a_formatting);
							break;
						}

						/* 2. Let the furthest block be the topmost node in the
						stack of open elements that is lower in the stack
						than the formatting element, and is not an element in
						the phrasing or formatting categories. There might
						not be one. */
						$fe_s_pos = array_search($formatting_element, $this->stack, true);
						$length = count($this->stack);

						for($s = $fe_s_pos + 1; $s < $length; $s++) {
							$category = $this->getElementCategory($this->stack[$s]->nodeName);

							if($category !== self::PHRASING && $category !== self::FORMATTING) {
								$furthest_block = $this->stack[$s];
							}
						}

						/* 3. If there is no furthest block, then the UA must
						skip the subsequent steps and instead just pop all
						the nodes from the bottom of the stack of open
						elements, from the current node up to the formatting
						element, and remove the formatting element from the
						list of active formatting elements. */
						if(!isset($furthest_block)) {
							for($n = $length - 1; $n >= $fe_s_pos; $n--) {
								array_pop($this->stack);
							}

							unset($this->a_formatting[$fe_af_pos]);
							$this->a_formatting = array_merge($this->a_formatting);
							break;
						}

						/* 4. Let the common ancestor be the element
						immediately above the formatting element in the stack
						of open elements. */
						$common_ancestor = $this->stack[$fe_s_pos - 1];

						/* 5. If the furthest block has a parent node, then
						remove the furthest block from its parent node. */
						if($furthest_block->parentNode !== null) {
							$furthest_block->parentNode->removeChild($furthest_block);
						}

						/* 6. Let a bookmark note the position of the
						formatting element in the list of active formatting
						elements relative to the elements on either side
						of it in the list. */
						$bookmark = $fe_af_pos;

						/* 7. Let node and last node  be the furthest block.
						Follow these steps: */
						$node = $furthest_block;
						$last_node = $furthest_block;

						while(true) {
							for($n = array_search($node, $this->stack, true) - 1; $n >= 0; $n--) {
								/* 7.1 Let node be the element immediately
								prior to node in the stack of open elements. */
								$node = $this->stack[$n];

								/* 7.2 If node is not in the list of active
								formatting elements, then remove node from
								the stack of open elements and then go back
								to step 1. */
								if(!in_array($node, $this->a_formatting, true)) {
									unset($this->stack[$n]);
									$this->stack = array_merge($this->stack);

								} else {
									break;
								}
							}

							/* 7.3 Otherwise, if node is the formatting
							element, then go to the next step in the overall
							algorithm. */
							if($node === $formatting_element) {
								break;

							/* 7.4 Otherwise, if last node is the furthest
							block, then move the aforementioned bookmark to
							be immediately after the node in the list of
							active formatting elements. */
							} elseif($last_node === $furthest_block) {
								$bookmark = array_search($node, $this->a_formatting, true) + 1;
							}

							/* 7.5 If node has any children, perform a
							shallow clone of node, replace the entry for
							node in the list of active formatting elements
							with an entry for the clone, replace the entry
							for node in the stack of open elements with an
							entry for the clone, and let node be the clone. */
							if($node->hasChildNodes()) {
								$clone = $node->cloneNode();
								$s_pos = array_search($node, $this->stack, true);
								$a_pos = array_search($node, $this->a_formatting, true);

								$this->stack[$s_pos] = $clone;
								$this->a_formatting[$a_pos] = $clone;
								$node = $clone;
							}

							/* 7.6 Insert last node into node, first removing
							it from its previous parent node if any. */
							if($last_node->parentNode !== null) {
								$last_node->parentNode->removeChild($last_node);
							}

							$node->appendChild($last_node);

							/* 7.7 Let last node be node. */
							$last_node = $node;
						}

						/* 8. Insert whatever last node ended up being in
						the previous step into the common ancestor node,
						first removing it from its previous parent node if
						any. */
						if($last_node->parentNode !== null) {
							$last_node->parentNode->removeChild($last_node);
						}

						$common_ancestor->appendChild($last_node);

						/* 9. Perform a shallow clone of the formatting
						element. */
						$clone = $formatting_element->cloneNode();

						/* 10. Take all of the child nodes of the furthest
						block and append them to the clone created in the
						last step. */
						while($furthest_block->hasChildNodes()) {
							$child = $furthest_block->firstChild;
							$furthest_block->removeChild($child);
							$clone->appendChild($child);
						}

						/* 11. Append that clone to the furthest block. */
						$furthest_block->appendChild($clone);

						/* 12. Remove the formatting element from the list
						of active formatting elements, and insert the clone
						into the list of active formatting elements at the
						position of the aforementioned bookmark. */
						$fe_af_pos = array_search($formatting_element, $this->a_formatting, true);
						unset($this->a_formatting[$fe_af_pos]);
						$this->a_formatting = array_merge($this->a_formatting);

						$af_part1 = array_slice($this->a_formatting, 0, $bookmark - 1);
						$af_part2 = array_slice($this->a_formatting, $bookmark, count($this->a_formatting));
						$this->a_formatting = array_merge($af_part1, array($clone), $af_part2);

						/* 13. Remove the formatting element from the stack
						of open elements, and insert the clone into the stack
						of open elements immediately after (i.e. in a more
						deeply nested position than) the position of the
						furthest block in that stack. */
						$fe_s_pos = array_search($formatting_element, $this->stack, true);
						$fb_s_pos = array_search($furthest_block, $this->stack, true);
						unset($this->stack[$fe_s_pos]);

						$s_part1 = array_slice($this->stack, 0, $fb_s_pos);
						$s_part2 = array_slice($this->stack, $fb_s_pos + 1, count($this->stack));
						$this->stack = array_merge($s_part1, array($clone), $s_part2);

						/* 14. Jump back to step 1 in this series of steps. */
						unset($formatting_element, $fe_af_pos, $fe_s_pos, $furthest_block);
					}
				break;

				/* An end tag token whose tag name is one of: "button",
				"marquee", "object" */
				case 'button': case 'marquee': case 'object':
					/* If the stack of open elements has an element in scope whose
					tag name matches the tag name of the token, then generate implied
					tags. */
					if($this->elementInScope($token['name'])) {
						$this->generateImpliedEndTags();

						/* Now, if the current node is not an element with the same
						tag name as the token, then this is a parse error. */
						// k

						/* Now, if the stack of open elements has an element in scope
						whose tag name matches the tag name of the token, then pop
						elements from the stack until that element has been popped from
						the stack, and clear the list of active formatting elements up
						to the last marker. */
						for($n = count($this->stack) - 1; $n >= 0; $n--) {
							if($this->stack[$n]->nodeName === $token['name']) {
								$n = -1;
							}

							array_pop($this->stack);
						}

						$marker = end(array_keys($this->a_formatting, self::MARKER, true));

						for($n = count($this->a_formatting) - 1; $n > $marker; $n--) {
							array_pop($this->a_formatting);
						}
					}
				break;

				/* Or an end tag whose tag name is one of: "area", "basefont",
				"bgsound", "br", "embed", "hr", "iframe", "image", "img",
				"input", "isindex", "noembed", "noframes", "param", "select",
				"spacer", "table", "textarea", "wbr" */
				case 'area': case 'basefont': case 'bgsound': case 'br':
				case 'embed': case 'hr': case 'iframe': case 'image':
				case 'img': case 'input': case 'isindex': case 'noembed':
				case 'noframes': case 'param': case 'select': case 'spacer':
				case 'table': case 'textarea': case 'wbr':
					// Parse error. Ignore the token.
				break;

				/* An end tag token not covered by the previous entries */
				default:
					for($n = count($this->stack) - 1; $n >= 0; $n--) {
						/* Initialise node to be the current node (the bottommost
						node of the stack). */
						$node = end($this->stack);

						/* If node has the same tag name as the end tag token,
						then: */
						if($token['name'] === $node->nodeName) {
							/* Generate implied end tags. */
							$this->generateImpliedEndTags();

							/* If the tag name of the end tag token does not
							match the tag name of the current node, this is a
							parse error. */
							// k

							/* Pop all the nodes from the current node up to
							node, including node, then stop this algorithm. */
							for($x = count($this->stack) - $n; $x >= $n; $x--) {
								array_pop($this->stack);
							}
									
						} else {
							$category = $this->getElementCategory($node);

							if($category !== self::SPECIAL && $category !== self::SCOPING) {
								/* Otherwise, if node is in neither the formatting
								category nor the phrasing category, then this is a
								parse error. Stop this algorithm. The end tag token
								is ignored. */
								return false;
							}
						}
					}
				break;
			}
			break;
		}
	}

	private function inTable($token) {
		$clear = array('html', 'table');

		/* A character token that is one of one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		or U+0020 SPACE */
		if($token['type'] === HTML5::CHARACTR &&
		preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
			/* Append the character to the current node. */
			$text = $this->dom->createTextNode($token['data']);
			end($this->stack)->appendChild($text);

		/* A comment token */
		} elseif($token['type'] === HTML5::COMMENT) {
			/* Append a Comment node to the current node with the data
			attribute set to the data given in the comment token. */
			$comment = $this->dom->createComment($token['data']);
			end($this->stack)->appendChild($comment);

		/* A start tag whose tag name is "caption" */
		} elseif($token['type'] === HTML5::STARTTAG &&
		$token['name'] === 'caption') {
			/* Clear the stack back to a table context. */
			$this->clearStackToTableContext($clear);

			/* Insert a marker at the end of the list of active
			formatting elements. */
			$this->a_formatting[] = self::MARKER;

			/* Insert an HTML element for the token, then switch the
			insertion mode to "in caption". */
			$this->insertElement($token);
			$this->mode = self::IN_CAPTION;

		/* A start tag whose tag name is "colgroup" */
		} elseif($token['type'] === HTML5::STARTTAG &&
		$token['name'] === 'colgroup') {
			/* Clear the stack back to a table context. */
			$this->clearStackToTableContext($clear);

			/* Insert an HTML element for the token, then switch the
			insertion mode to "in column group". */
			$this->insertElement($token);
			$this->mode = self::IN_CGROUP;

		/* A start tag whose tag name is "col" */
		} elseif($token['type'] === HTML5::STARTTAG &&
		$token['name'] === 'col') {
			$this->inTable(array(
				'name' => 'colgroup',
				'type' => HTML5::STARTTAG,
				'attr' => array()
			));

			$this->inColumnGroup($token);

		/* A start tag whose tag name is one of: "tbody", "tfoot", "thead" */
		} elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
		array('tbody', 'tfoot', 'thead'))) {
			/* Clear the stack back to a table context. */
			$this->clearStackToTableContext($clear);

			/* Insert an HTML element for the token, then switch the insertion
			mode to "in table body". */
			$this->insertElement($token);
			$this->mode = self::IN_TBODY;

		/* A start tag whose tag name is one of: "td", "th", "tr" */
		} elseif($token['type'] === HTML5::STARTTAG &&
		in_array($token['name'], array('td', 'th', 'tr'))) {
			/* Act as if a start tag token with the tag name "tbody" had been
			seen, then reprocess the current token. */
			$this->inTable(array(
				'name' => 'tbody',
				'type' => HTML5::STARTTAG,
				'attr' => array()
			));

			return $this->inTableBody($token);

		/* A start tag whose tag name is "table" */
		} elseif($token['type'] === HTML5::STARTTAG &&
		$token['name'] === 'table') {
			/* Parse error. Act as if an end tag token with the tag name "table"
			had been seen, then, if that token wasn't ignored, reprocess the
			current token. */
			$this->inTable(array(
				'name' => 'table',
				'type' => HTML5::ENDTAG
			));

			return $this->mainPhase($token);

		/* An end tag whose tag name is "table" */
		} elseif($token['type'] === HTML5::ENDTAG &&
		$token['name'] === 'table') {
			/* If the stack of open elements does not have an element in table
			scope with the same tag name as the token, this is a parse error.
			Ignore the token. (innerHTML case) */
			if(!$this->elementInScope($token['name'], true)) {
				return false;

			/* Otherwise: */
			} else {
				/* Generate implied end tags. */
				$this->generateImpliedEndTags();

				/* Now, if the current node is not a table element, then this
				is a parse error. */
				// w/e

				/* Pop elements from this stack until a table element has been
				popped from the stack. */
				while(true) {
					$current = end($this->stack)->nodeName;
					array_pop($this->stack);

					if($current === 'table') {
						break;
					}
				}

				/* Reset the insertion mode appropriately. */
				$this->resetInsertionMode();
			}

		/* An end tag whose tag name is one of: "body", "caption", "col",
		"colgroup", "html", "tbody", "td", "tfoot", "th", "thead", "tr" */
		} elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
		array('body', 'caption', 'col', 'colgroup', 'html', 'tbody', 'td',
		'tfoot', 'th', 'thead', 'tr'))) {
			// Parse error. Ignore the token.

		/* Anything else */
		} else {
			/* Parse error. Process the token as if the insertion mode was "in
			body", with the following exception: */

			/* If the current node is a table, tbody, tfoot, thead, or tr
			element, then, whenever a node would be inserted into the current
			node, it must instead be inserted into the foster parent element. */
			if(in_array(end($this->stack)->nodeName,
			array('table', 'tbody', 'tfoot', 'thead', 'tr'))) {
				/* The foster parent element is the parent element of the last
				table element in the stack of open elements, if there is a
				table element and it has such a parent element. If there is no
				table element in the stack of open elements (innerHTML case),
				then the foster parent element is the first element in the
				stack of open elements (the html  element). Otherwise, if there
				is a table element in the stack of open elements, but the last
				table element in the stack of open elements has no parent, or
				its parent node is not an element, then the foster parent
				element is the element before the last table element in the
				stack of open elements. */
				for($n = count($this->stack) - 1; $n >= 0; $n--) {
					if($this->stack[$n]->nodeName === 'table') {
						$table = $this->stack[$n];
						break;
					}
				}

				if(isset($table) && $table->parentNode !== null) {
					$this->foster_parent = $table->parentNode;

				} elseif(!isset($table)) {
					$this->foster_parent = $this->stack[0];

				} elseif(isset($table) && ($table->parentNode === null ||
				$table->parentNode->nodeType !== XML_ELEMENT_NODE)) {
					$this->foster_parent = $this->stack[$n - 1];
				}
			}

			$this->inBody($token);
		}
	}

	private function inCaption($token) {
		/* An end tag whose tag name is "caption" */
		if($token['type'] === HTML5::ENDTAG && $token['name'] === 'caption') {
			/* If the stack of open elements does not have an element in table
			scope with the same tag name as the token, this is a parse error.
			Ignore the token. (innerHTML case) */
			if(!$this->elementInScope($token['name'], true)) {
				// Ignore

			/* Otherwise: */
			} else {
				/* Generate implied end tags. */
				$this->generateImpliedEndTags();

				/* Now, if the current node is not a caption element, then this
				is a parse error. */
				// w/e

				/* Pop elements from this stack until a caption element has
				been popped from the stack. */
				while(true) {
					$node = end($this->stack)->nodeName;
					array_pop($this->stack);

					if($node === 'caption') {
						break;
					}
				}

				/* Clear the list of active formatting elements up to the last
				marker. */
				$this->clearTheActiveFormattingElementsUpToTheLastMarker();

				/* Switch the insertion mode to "in table". */
				$this->mode = self::IN_TABLE;
			}

		/* A start tag whose tag name is one of: "caption", "col", "colgroup",
		"tbody", "td", "tfoot", "th", "thead", "tr", or an end tag whose tag
		name is "table" */
		} elseif(($token['type'] === HTML5::STARTTAG && in_array($token['name'],
		array('caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
		'thead', 'tr'))) || ($token['type'] === HTML5::ENDTAG &&
		$token['name'] === 'table')) {
			/* Parse error. Act as if an end tag with the tag name "caption"
			had been seen, then, if that token wasn't ignored, reprocess the
			current token. */
			$this->inCaption(array(
				'name' => 'caption',
				'type' => HTML5::ENDTAG
			));

			return $this->inTable($token);

		/* An end tag whose tag name is one of: "body", "col", "colgroup",
		"html", "tbody", "td", "tfoot", "th", "thead", "tr" */
		} elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
		array('body', 'col', 'colgroup', 'html', 'tbody', 'tfoot', 'th',
		'thead', 'tr'))) {
			// Parse error. Ignore the token.

		/* Anything else */
		} else {
			/* Process the token as if the insertion mode was "in body". */
			$this->inBody($token);
		}
	}

	private function inColumnGroup($token) {
		/* A character token that is one of one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		or U+0020 SPACE */
		if($token['type'] === HTML5::CHARACTR &&
		preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
			/* Append the character to the current node. */
			$text = $this->dom->createTextNode($token['data']);
			end($this->stack)->appendChild($text);

		/* A comment token */
		} elseif($token['type'] === HTML5::COMMENT) {
			/* Append a Comment node to the current node with the data
			attribute set to the data given in the comment token. */
			$comment = $this->dom->createComment($token['data']);
			end($this->stack)->appendChild($comment);

		/* A start tag whose tag name is "col" */
		} elseif($token['type'] === HTML5::STARTTAG && $token['name'] === 'col') {
			/* Insert a col element for the token. Immediately pop the current
			node off the stack of open elements. */
			$this->insertElement($token);
			array_pop($this->stack);

		/* An end tag whose tag name is "colgroup" */
		} elseif($token['type'] === HTML5::ENDTAG &&
		$token['name'] === 'colgroup') {
			/* If the current node is the root html element, then this is a
			parse error, ignore the token. (innerHTML case) */
			if(end($this->stack)->nodeName === 'html') {
				// Ignore

			/* Otherwise, pop the current node (which will be a colgroup
			element) from the stack of open elements. Switch the insertion
			mode to "in table". */
			} else {
				array_pop($this->stack);
				$this->mode = self::IN_TABLE;
			}

		/* An end tag whose tag name is "col" */
		} elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'col') {
			/* Parse error. Ignore the token. */

		/* Anything else */
		} else {
			/* Act as if an end tag with the tag name "colgroup" had been seen,
			and then, if that token wasn't ignored, reprocess the current token. */
			$this->inColumnGroup(array(
				'name' => 'colgroup',
				'type' => HTML5::ENDTAG
			));

			return $this->inTable($token);
		}
	}

	private function inTableBody($token) {
		$clear = array('tbody', 'tfoot', 'thead', 'html');

		/* A start tag whose tag name is "tr" */
		if($token['type'] === HTML5::STARTTAG && $token['name'] === 'tr') {
			/* Clear the stack back to a table body context. */
			$this->clearStackToTableContext($clear);

			/* Insert a tr element for the token, then switch the insertion
			mode to "in row". */
			$this->insertElement($token);
			$this->mode = self::IN_ROW;

		/* A start tag whose tag name is one of: "th", "td" */
		} elseif($token['type'] === HTML5::STARTTAG &&
		($token['name'] === 'th' ||	$token['name'] === 'td')) {
			/* Parse error. Act as if a start tag with the tag name "tr" had
			been seen, then reprocess the current token. */
			$this->inTableBody(array(
				'name' => 'tr',
				'type' => HTML5::STARTTAG,
				'attr' => array()
			));

			return $this->inRow($token);

		/* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
		} elseif($token['type'] === HTML5::ENDTAG &&
		in_array($token['name'], array('tbody', 'tfoot', 'thead'))) {
			/* If the stack of open elements does not have an element in table
			scope with the same tag name as the token, this is a parse error.
			Ignore the token. */
			if(!$this->elementInScope($token['name'], true)) {
				// Ignore

			/* Otherwise: */
			} else {
				/* Clear the stack back to a table body context. */
				$this->clearStackToTableContext($clear);

				/* Pop the current node from the stack of open elements. Switch
				the insertion mode to "in table". */
				array_pop($this->stack);
				$this->mode = self::IN_TABLE;
			}

		/* A start tag whose tag name is one of: "caption", "col", "colgroup",
		"tbody", "tfoot", "thead", or an end tag whose tag name is "table" */
		} elseif(($token['type'] === HTML5::STARTTAG && in_array($token['name'],
		array('caption', 'col', 'colgroup', 'tbody', 'tfoor', 'thead'))) ||
		($token['type'] === HTML5::STARTTAG && $token['name'] === 'table')) {
			/* If the stack of open elements does not have a tbody, thead, or
			tfoot element in table scope, this is a parse error. Ignore the
			token. (innerHTML case) */
			if(!$this->elementInScope(array('tbody', 'thead', 'tfoot'), true)) {
				// Ignore.

			/* Otherwise: */
			} else {
				/* Clear the stack back to a table body context. */
				$this->clearStackToTableContext($clear);

				/* Act as if an end tag with the same tag name as the current
				node ("tbody", "tfoot", or "thead") had been seen, then
				reprocess the current token. */
				$this->inTableBody(array(
					'name' => end($this->stack)->nodeName,
					'type' => HTML5::ENDTAG
				));

				return $this->mainPhase($token);
			}

		/* An end tag whose tag name is one of: "body", "caption", "col",
		"colgroup", "html", "td", "th", "tr" */
		} elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
		array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th', 'tr'))) {
			/* Parse error. Ignore the token. */

		/* Anything else */
		} else {
			/* Process the token as if the insertion mode was "in table". */
			$this->inTable($token);
		}
	}

	private function inRow($token) {
		$clear = array('tr', 'html');

		/* A start tag whose tag name is one of: "th", "td" */
		if($token['type'] === HTML5::STARTTAG &&
		($token['name'] === 'th' || $token['name'] === 'td')) {
			/* Clear the stack back to a table row context. */
			$this->clearStackToTableContext($clear);

			/* Insert an HTML element for the token, then switch the insertion
			mode to "in cell". */
			$this->insertElement($token);
			$this->mode = self::IN_CELL;

			/* Insert a marker at the end of the list of active formatting
			elements. */
			$this->a_formatting[] = self::MARKER;

		/* An end tag whose tag name is "tr" */
		} elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'tr') {
			/* If the stack of open elements does not have an element in table
			scope with the same tag name as the token, this is a parse error.
			Ignore the token. (innerHTML case) */
			if(!$this->elementInScope($token['name'], true)) {
				// Ignore.

			/* Otherwise: */
			} else {
				/* Clear the stack back to a table row context. */
				$this->clearStackToTableContext($clear);

				/* Pop the current node (which will be a tr element) from the
				stack of open elements. Switch the insertion mode to "in table
				body". */
				array_pop($this->stack);
				$this->mode = self::IN_TBODY;
			}

		/* A start tag whose tag name is one of: "caption", "col", "colgroup",
		"tbody", "tfoot", "thead", "tr" or an end tag whose tag name is "table" */
		} elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
		array('caption', 'col', 'colgroup', 'tbody', 'tfoot', 'thead', 'tr'))) {
			/* Act as if an end tag with the tag name "tr" had been seen, then,
			if that token wasn't ignored, reprocess the current token. */
			$this->inRow(array(
				'name' => 'tr',
				'type' => HTML5::ENDTAG
			));

			return $this->inCell($token);

		/* An end tag whose tag name is one of: "tbody", "tfoot", "thead" */
		} elseif($token['type'] === HTML5::ENDTAG &&
		in_array($token['name'], array('tbody', 'tfoot', 'thead'))) {
			/* If the stack of open elements does not have an element in table
			scope with the same tag name as the token, this is a parse error.
			Ignore the token. */
			if(!$this->elementInScope($token['name'], true)) {
				// Ignore.

			/* Otherwise: */
			} else {
				/* Otherwise, act as if an end tag with the tag name "tr" had
				been seen, then reprocess the current token. */
				$this->inRow(array(
					'name' => 'tr',
					'type' => HTML5::ENDTAG
				));

				return $this->inCell($token);
			}

		/* An end tag whose tag name is one of: "body", "caption", "col",
		"colgroup", "html", "td", "th" */
		} elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
		array('body', 'caption', 'col', 'colgroup', 'html', 'td', 'th', 'tr'))) {
			/* Parse error. Ignore the token. */

		/* Anything else */
		} else {
			/* Process the token as if the insertion mode was "in table". */
			$this->inTable($token);
		}
	}

	private function inCell($token) {
		/* An end tag whose tag name is one of: "td", "th" */
		if($token['type'] === HTML5::ENDTAG &&
		($token['name'] === 'td' || $token['name'] === 'th')) {
			/* If the stack of open elements does not have an element in table
			scope with the same tag name as that of the token, then this is a
			parse error and the token must be ignored. */
			if(!$this->elementInScope($token['name'], true)) {
				// Ignore.

			/* Otherwise: */
			} else {
				/* Generate implied end tags, except for elements with the same
				tag name as the token. */
				$this->generateImpliedEndTags(array($token['name']));

				/* Now, if the current node is not an element with the same tag
				name as the token, then this is a parse error. */
				// k

				/* Pop elements from this stack until an element with the same
				tag name as the token has been popped from the stack. */
				while(true) {
					$node = end($this->stack)->nodeName;
					array_pop($this->stack);

					if($node === $token['name']) {
						break;
					}
				}

				/* Clear the list of active formatting elements up to the last
				marker. */
				$this->clearTheActiveFormattingElementsUpToTheLastMarker();

				/* Switch the insertion mode to "in row". (The current node
				will be a tr element at this point.) */
				$this->mode = self::IN_ROW;
			}

		/* A start tag whose tag name is one of: "caption", "col", "colgroup",
		"tbody", "td", "tfoot", "th", "thead", "tr" */
		} elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
		array('caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
		'thead', 'tr'))) {
			/* If the stack of open elements does not have a td or th element
			in table scope, then this is a parse error; ignore the token.
			(innerHTML case) */
			if(!$this->elementInScope(array('td', 'th'), true)) {
				// Ignore.

			/* Otherwise, close the cell (see below) and reprocess the current
			token. */
			} else {
				$this->closeCell();
				return $this->inRow($token);
			}

		/* A start tag whose tag name is one of: "caption", "col", "colgroup",
		"tbody", "td", "tfoot", "th", "thead", "tr" */
		} elseif($token['type'] === HTML5::STARTTAG && in_array($token['name'],
		array('caption', 'col', 'colgroup', 'tbody', 'td', 'tfoot', 'th',
		'thead', 'tr'))) {
			/* If the stack of open elements does not have a td or th element
			in table scope, then this is a parse error; ignore the token.
			(innerHTML case) */
			if(!$this->elementInScope(array('td', 'th'), true)) {
				// Ignore.

			/* Otherwise, close the cell (see below) and reprocess the current
			token. */
			} else {
				$this->closeCell();
				return $this->inRow($token);
			}

		/* An end tag whose tag name is one of: "body", "caption", "col",
		"colgroup", "html" */
		} elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
		array('body', 'caption', 'col', 'colgroup', 'html'))) {
			/* Parse error. Ignore the token. */

		/* An end tag whose tag name is one of: "table", "tbody", "tfoot",
		"thead", "tr" */
		} elseif($token['type'] === HTML5::ENDTAG && in_array($token['name'],
		array('table', 'tbody', 'tfoot', 'thead', 'tr'))) {
			/* If the stack of open elements does not have an element in table
			scope with the same tag name as that of the token (which can only
			happen for "tbody", "tfoot" and "thead", or, in the innerHTML case),
			then this is a parse error and the token must be ignored. */
			if(!$this->elementInScope($token['name'], true)) {
				// Ignore.

			/* Otherwise, close the cell (see below) and reprocess the current
			token. */
			} else {
				$this->closeCell();
				return $this->inRow($token);
			}

		/* Anything else */
		} else {
			/* Process the token as if the insertion mode was "in body". */
			$this->inBody($token);
		}
	}

	private function inSelect($token) {
		/* Handle the token as follows: */

		/* A character token */
		if($token['type'] === HTML5::CHARACTR) {
			/* Append the token's character to the current node. */
			$this->insertText($token['data']);

		/* A comment token */
		} elseif($token['type'] === HTML5::COMMENT) {
			/* Append a Comment node to the current node with the data
			attribute set to the data given in the comment token. */
			$this->insertComment($token['data']);

		/* A start tag token whose tag name is "option" */
		} elseif($token['type'] === HTML5::STARTTAG &&
		$token['name'] === 'option') {
			/* If the current node is an option element, act as if an end tag
			with the tag name "option" had been seen. */
			if(end($this->stack)->nodeName === 'option') {
				$this->inSelect(array(
					'name' => 'option',
					'type' => HTML5::ENDTAG
				));
			}

			/* Insert an HTML element for the token. */
			$this->insertElement($token);

		/* A start tag token whose tag name is "optgroup" */
		} elseif($token['type'] === HTML5::STARTTAG &&
		$token['name'] === 'optgroup') {
			/* If the current node is an option element, act as if an end tag
			with the tag name "option" had been seen. */
			if(end($this->stack)->nodeName === 'option') {
				$this->inSelect(array(
					'name' => 'option',
					'type' => HTML5::ENDTAG
				));
			}

			/* If the current node is an optgroup element, act as if an end tag
			with the tag name "optgroup" had been seen. */
			if(end($this->stack)->nodeName === 'optgroup') {
				$this->inSelect(array(
					'name' => 'optgroup',
					'type' => HTML5::ENDTAG
				));
			}

			/* Insert an HTML element for the token. */
			$this->insertElement($token);

		/* An end tag token whose tag name is "optgroup" */
		} elseif($token['type'] === HTML5::ENDTAG &&
		$token['name'] === 'optgroup') {
			/* First, if the current node is an option element, and the node
			immediately before it in the stack of open elements is an optgroup
			element, then act as if an end tag with the tag name "option" had
			been seen. */
			$elements_in_stack = count($this->stack);

			if($this->stack[$elements_in_stack - 1]->nodeName === 'option' &&
			$this->stack[$elements_in_stack - 2]->nodeName === 'optgroup') {
				$this->inSelect(array(
					'name' => 'option',
					'type' => HTML5::ENDTAG
				));
			}

			/* If the current node is an optgroup element, then pop that node
			from the stack of open elements. Otherwise, this is a parse error,
			ignore the token. */
			if($this->stack[$elements_in_stack - 1] === 'optgroup') {
				array_pop($this->stack);
			}

		/* An end tag token whose tag name is "option" */
		} elseif($token['type'] === HTML5::ENDTAG &&
		$token['name'] === 'option') {
			/* If the current node is an option element, then pop that node
			from the stack of open elements. Otherwise, this is a parse error,
			ignore the token. */
			if(end($this->stack)->nodeName === 'option') {
				array_pop($this->stack);
			}

		/* An end tag whose tag name is "select" */
		} elseif($token['type'] === HTML5::ENDTAG &&
		$token['name'] === 'select') {
			/* If the stack of open elements does not have an element in table
			scope with the same tag name as the token, this is a parse error.
			Ignore the token. (innerHTML case) */
			if(!$this->elementInScope($token['name'], true)) {
				// w/e

			/* Otherwise: */
			} else {
				/* Pop elements from the stack of open elements until a select
				element has been popped from the stack. */
				while(true) {
					$current = end($this->stack)->nodeName;
					array_pop($this->stack);

					if($current === 'select') {
						break;
					}
				}

				/* Reset the insertion mode appropriately. */
				$this->resetInsertionMode();
			}

		/* A start tag whose tag name is "select" */
		} elseif($token['name'] === 'select' &&
		$token['type'] === HTML5::STARTTAG) {
			/* Parse error. Act as if the token had been an end tag with the
			tag name "select" instead. */
			$this->inSelect(array(
				'name' => 'select',
				'type' => HTML5::ENDTAG
			));

		/* An end tag whose tag name is one of: "caption", "table", "tbody",
		"tfoot", "thead", "tr", "td", "th" */
		} elseif(in_array($token['name'], array('caption', 'table', 'tbody',
		'tfoot', 'thead', 'tr', 'td', 'th')) && $token['type'] === HTML5::ENDTAG) {
			/* Parse error. */
			// w/e

			/* If the stack of open elements has an element in table scope with
			the same tag name as that of the token, then act as if an end tag
			with the tag name "select" had been seen, and reprocess the token.
			Otherwise, ignore the token. */
			if($this->elementInScope($token['name'], true)) {
				$this->inSelect(array(
					'name' => 'select',
					'type' => HTML5::ENDTAG
				));

				$this->mainPhase($token);
			}

		/* Anything else */
		} else {
			/* Parse error. Ignore the token. */
		}
	}

	private function afterBody($token) {
		/* Handle the token as follows: */

		/* A character token that is one of one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		or U+0020 SPACE */
		if($token['type'] === HTML5::CHARACTR &&
		preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
			/* Process the token as it would be processed if the insertion mode
			was "in body". */
			$this->inBody($token);

		/* A comment token */
		} elseif($token['type'] === HTML5::COMMENT) {
			/* Append a Comment node to the first element in the stack of open
			elements (the html element), with the data attribute set to the
			data given in the comment token. */
			$comment = $this->dom->createComment($token['data']);
			$this->stack[0]->appendChild($comment);

		/* An end tag with the tag name "html" */
		} elseif($token['type'] === HTML5::ENDTAG && $token['name'] === 'html') {
			/* If the parser was originally created in order to handle the
			setting of an element's innerHTML attribute, this is a parse error;
			ignore the token. (The element will be an html element in this
			case.) (innerHTML case) */

			/* Otherwise, switch to the trailing end phase. */
			$this->phase = self::END_PHASE;

		/* Anything else */
		} else {
			/* Parse error. Set the insertion mode to "in body" and reprocess
			the token. */
			$this->mode = self::IN_BODY;
			return $this->inBody($token);
		}
	}

	private function inFrameset($token) {
		/* Handle the token as follows: */

		/* A character token that is one of one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
		if($token['type'] === HTML5::CHARACTR &&
		preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
			/* Append the character to the current node. */
			$this->insertText($token['data']);

		/* A comment token */
		} elseif($token['type'] === HTML5::COMMENT) {
			/* Append a Comment node to the current node with the data
			attribute set to the data given in the comment token. */
			$this->insertComment($token['data']);

		/* A start tag with the tag name "frameset" */
		} elseif($token['name'] === 'frameset' &&
		$token['type'] === HTML5::STARTTAG) {
			$this->insertElement($token);

		/* An end tag with the tag name "frameset" */
		} elseif($token['name'] === 'frameset' &&
		$token['type'] === HTML5::ENDTAG) {
			/* If the current node is the root html element, then this is a
			parse error; ignore the token. (innerHTML case) */
			if(end($this->stack)->nodeName === 'html') {
				// Ignore

			} else {
				/* Otherwise, pop the current node from the stack of open
				elements. */
				array_pop($this->stack);

				/* If the parser was not originally created in order to handle
				the setting of an element's innerHTML attribute (innerHTML case),
				and the current node is no longer a frameset element, then change
				the insertion mode to "after frameset". */
				$this->mode = self::AFTR_FRAME;
			}

		/* A start tag with the tag name "frame" */
		} elseif($token['name'] === 'frame' &&
		$token['type'] === HTML5::STARTTAG) {
			/* Insert an HTML element for the token. */
			$this->insertElement($token);

			/* Immediately pop the current node off the stack of open elements. */
			array_pop($this->stack);

		/* A start tag with the tag name "noframes" */
		} elseif($token['name'] === 'noframes' &&
		$token['type'] === HTML5::STARTTAG) {
			/* Process the token as if the insertion mode had been "in body". */
			$this->inBody($token);

		/* Anything else */
		} else {
			/* Parse error. Ignore the token. */
		}
	}

	private function afterFrameset($token) {
		/* Handle the token as follows: */

		/* A character token that is one of one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		U+000D CARRIAGE RETURN (CR), or U+0020 SPACE */
		if($token['type'] === HTML5::CHARACTR &&
		preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
			/* Append the character to the current node. */
			$this->insertText($token['data']);

		/* A comment token */
		} elseif($token['type'] === HTML5::COMMENT) {
			/* Append a Comment node to the current node with the data
			attribute set to the data given in the comment token. */
			$this->insertComment($token['data']);

		/* An end tag with the tag name "html" */
		} elseif($token['name'] === 'html' &&
		$token['type'] === HTML5::ENDTAG) {
			/* Switch to the trailing end phase. */
			$this->phase = self::END_PHASE;

		/* A start tag with the tag name "noframes" */
		} elseif($token['name'] === 'noframes' &&
		$token['type'] === HTML5::STARTTAG) {
			/* Process the token as if the insertion mode had been "in body". */
			$this->inBody($token);

		/* Anything else */
		} else {
			/* Parse error. Ignore the token. */
		}
	}

	private function trailingEndPhase($token) {
		/* After the main phase, as each token is emitted from the tokenisation
		stage, it must be processed as described in this section. */

		/* A DOCTYPE token */
		if($token['type'] === HTML5::DOCTYPE) {
			// Parse error. Ignore the token.

		/* A comment token */
		} elseif($token['type'] === HTML5::COMMENT) {
			/* Append a Comment node to the Document object with the data
			attribute set to the data given in the comment token. */
			$comment = $this->dom->createComment($token['data']);
			$this->dom->appendChild($comment);

		/* A character token that is one of one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		or U+0020 SPACE */
		} elseif($token['type'] === HTML5::CHARACTR &&
		preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) {
			/* Process the token as it would be processed in the main phase. */
			$this->mainPhase($token);

		/* A character token that is not one of U+0009 CHARACTER TABULATION,
		U+000A LINE FEED (LF), U+000B LINE TABULATION, U+000C FORM FEED (FF),
		or U+0020 SPACE. Or a start tag token. Or an end tag token. */
		} elseif(($token['type'] === HTML5::CHARACTR &&
		preg_match('/^[\t\n\x0b\x0c ]+$/', $token['data'])) ||
		$token['type'] === HTML5::STARTTAG || $token['type'] === HTML5::ENDTAG) {
			/* Parse error. Switch back to the main phase and reprocess the
			token. */
			$this->phase = self::MAIN_PHASE;
			return $this->mainPhase($token);

		/* An end-of-file token */
		} elseif($token['type'] === HTML5::EOF) {
			/* OMG DONE!! */
		}
	}

	private function insertElement($token, $append = true) {
		$el = $this->dom->createElement($token['name']);

		foreach($token['attr'] as $attr) {
			if(!$el->hasAttribute($attr['name'])) {
				$el->setAttribute($attr['name'], $attr['value']);
			}
		}

		$this->appendToRealParent($el);
		$this->stack[] = $el;

		return $el;
	}

	private function insertText($data) {
		$text = $this->dom->createTextNode($data);
		$this->appendToRealParent($text);
	}

	private function insertComment($data) {
		$comment = $this->dom->createComment($data);
		$this->appendToRealParent($comment);
	}

	private function appendToRealParent($node) {
		if($this->foster_parent === null) {
			end($this->stack)->appendChild($node);

		} elseif($this->foster_parent !== null) {
			/* If the foster parent element is the parent element of the
			last table element in the stack of open elements, then the new
			node must be inserted immediately before the last table element
			in the stack of open elements in the foster parent element;
			otherwise, the new node must be appended to the foster parent
			element. */
			for($n = count($this->stack) - 1; $n >= 0; $n--) {
				if($this->stack[$n]->nodeName === 'table' &&
				$this->stack[$n]->parentNode !== null) {
					$table = $this->stack[$n];
					break;
				}
			}

			if(isset($table) && $this->foster_parent->isSameNode($table->parentNode))
				$this->foster_parent->insertBefore($node, $table);
			else
				$this->foster_parent->appendChild($node);

			$this->foster_parent = null;
		}
	}

	private function elementInScope($el, $table = false) {
		if(is_array($el)) {
			foreach($el as $element) {
				if($this->elementInScope($element, $table)) {
					return true;
				}
			}

			return false;
		}

		$leng = count($this->stack);

		for($n = 0; $n < $leng; $n++) {
			/* 1. Initialise node to be the current node (the bottommost node of
			the stack). */
			$node = $this->stack[$leng - 1 - $n];

			if($node->tagName === $el) {
				/* 2. If node is the target node, terminate in a match state. */
				return true;

			} elseif($node->tagName === 'table') {
				/* 3. Otherwise, if node is a table element, terminate in a failure
				state. */
				return false;

			} elseif($table === true && in_array($node->tagName, array('caption', 'td',
			'th', 'button', 'marquee', 'object'))) {
				/* 4. Otherwise, if the algorithm is the "has an element in scope"
				variant (rather than the "has an element in table scope" variant),
				and node is one of the following, terminate in a failure state. */
				return false;

			} elseif($node === $node->ownerDocument->documentElement) {
				/* 5. Otherwise, if node is an html element (root element), terminate
				in a failure state. (This can only happen if the node is the topmost
				node of the	stack of open elements, and prevents the next step from
				being invoked if there are no more elements in the stack.) */
				return false;
			}

			/* Otherwise, set node to the previous entry in the stack of open
			elements and return to step 2. (This will never fail, since the loop
			will always terminate in the previous step if the top of the stack
			is reached.) */
		}
	}

	private function reconstructActiveFormattingElements() {
		/* 1. If there are no entries in the list of active formatting elements,
		then there is nothing to reconstruct; stop this algorithm. */
		$formatting_elements = count($this->a_formatting);

		if($formatting_elements === 0) {
			return false;
		}

		/* 3. Let entry be the last (most recently added) element in the list
		of active formatting elements. */
		$entry = end($this->a_formatting);

		/* 2. If the last (most recently added) entry in the list of active
		formatting elements is a marker, or if it is an element that is in the
		stack of open elements, then there is nothing to reconstruct; stop this
		algorithm. */
		if($entry === self::MARKER || in_array($entry, $this->stack, true)) {
			return false;
		}

		for($a = $formatting_elements - 1; $a >= 0; true) {
			/* 4. If there are no entries before entry in the list of active
			formatting elements, then jump to step 8. */
			if($a === 0) {
				$step_seven = false;
				break;
			}

			/* 5. Let entry be the entry one earlier than entry in the list of
			active formatting elements. */
			$a--;
			$entry = $this->a_formatting[$a];

			/* 6. If entry is neither a marker nor an element that is also in
			thetack of open elements, go to step 4. */
			if($entry === self::MARKER || in_array($entry, $this->stack, true)) {
				break;
			}
		}

		while(true) {
			/* 7. Let entry be the element one later than entry in the list of
			active formatting elements. */
			if(isset($step_seven) && $step_seven === true) {
				$a++;
				$entry = $this->a_formatting[$a];
			}

			/* 8. Perform a shallow clone of the element entry to obtain clone. */
			$clone = $entry->cloneNode();

			/* 9. Append clone to the current node and push it onto the stack
			of open elements  so that it is the new current node. */
			end($this->stack)->appendChild($clone);
			$this->stack[] = $clone;

			/* 10. Replace the entry for entry in the list with an entry for
			clone. */
			$this->a_formatting[$a] = $clone;

			/* 11. If the entry for clone in the list of active formatting
			elements is not the last entry in the list, return to step 7. */
			if(end($this->a_formatting) !== $clone) {
				$step_seven = true;
			} else {
				break;
			}
		}
	}

	private function clearTheActiveFormattingElementsUpToTheLastMarker() {
		/* When the steps below require the UA to clear the list of active
		formatting elements up to the last marker, the UA must perform the
		following steps: */

		while(true) {
			/* 1. Let entry be the last (most recently added) entry in the list
			of active formatting elements. */
			$entry = end($this->a_formatting);

			/* 2. Remove entry from the list of active formatting elements. */
			array_pop($this->a_formatting);

			/* 3. If entry was a marker, then stop the algorithm at this point.
			The list has been cleared up to the last marker. */
			if($entry === self::MARKER) {
				break;
			}
		}
	}

	private function generateImpliedEndTags($exclude = array()) {
		/* When the steps below require the UA to generate implied end tags,
		then, if the current node is a dd element, a dt element, an li element,
		a p element, a td element, a th  element, or a tr element, the UA must
		act as if an end tag with the respective tag name had been seen and
		then generate implied end tags again. */
		$node = end($this->stack);
		$elements = array_diff(array('dd', 'dt', 'li', 'p', 'td', 'th', 'tr'), $exclude);

		while(in_array(end($this->stack)->nodeName, $elements)) {
			array_pop($this->stack);
		}
	}

	private function getElementCategory($node) {
		$name = $node->tagName;
		if(in_array($name, $this->special))
			return self::SPECIAL;

		elseif(in_array($name, $this->scoping))
			return self::SCOPING;

		elseif(in_array($name, $this->formatting))
			return self::FORMATTING;

		else
			return self::PHRASING;
	}

	private function clearStackToTableContext($elements) {
		/* When the steps above require the UA to clear the stack back to a
		table context, it means that the UA must, while the current node is not
		a table element or an html element, pop elements from the stack of open
		elements. If this causes any elements to be popped from the stack, then
		this is a parse error. */
		while(true) {
			$node = end($this->stack)->nodeName;

			if(in_array($node, $elements)) {
				break;
			} else {
				array_pop($this->stack);
			}
		}
	}

	private function resetInsertionMode() {
		/* 1. Let last be false. */
		$last = false;
		$leng = count($this->stack);

		for($n = $leng - 1; $n >= 0; $n--) {
			/* 2. Let node be the last node in the stack of open elements. */
			$node = $this->stack[$n];

			/* 3. If node is the first node in the stack of open elements, then
			set last to true. If the element whose innerHTML  attribute is being
			set is neither a td  element nor a th element, then set node to the
			element whose innerHTML  attribute is being set. (innerHTML  case) */
			if($this->stack[0]->isSameNode($node)) {
				$last = true;
			}

			/* 4. If node is a select element, then switch the insertion mode to
			"in select" and abort these steps. (innerHTML case) */
			if($node->nodeName === 'select') {
				$this->mode = self::IN_SELECT;
				break;

			/* 5. If node is a td or th element, then switch the insertion mode
			to "in cell" and abort these steps. */
			} elseif($node->nodeName === 'td' || $node->nodeName === 'th') {
				$this->mode = self::IN_CELL;
				break;

			/* 6. If node is a tr element, then switch the insertion mode to
			"in	row" and abort these steps. */
			} elseif($node->nodeName === 'tr') {
				$this->mode = self::IN_ROW;
				break;

			/* 7. If node is a tbody, thead, or tfoot element, then switch the
			insertion mode to "in table body" and abort these steps. */
			} elseif(in_array($node->nodeName, array('tbody', 'thead', 'tfoot'))) {
				$this->mode = self::IN_TBODY;
				break;

			/* 8. If node is a caption element, then switch the insertion mode
			to "in caption" and abort these steps. */
			} elseif($node->nodeName === 'caption') {
				$this->mode = self::IN_CAPTION;
				break;

			/* 9. If node is a colgroup element, then switch the insertion mode
			to "in column group" and abort these steps. (innerHTML case) */
			} elseif($node->nodeName === 'colgroup') {
				$this->mode = self::IN_CGROUP;
				break;

			/* 10. If node is a table element, then switch the insertion mode
			to "in table" and abort these steps. */
			} elseif($node->nodeName === 'table') {
				$this->mode = self::IN_TABLE;
				break;

			/* 11. If node is a head element, then switch the insertion mode
			to "in body" ("in body"! not "in head"!) and abort these steps.
			(innerHTML case) */
			} elseif($node->nodeName === 'head') {
				$this->mode = self::IN_BODY;
				break;

			/* 12. If node is a body element, then switch the insertion mode to
			"in body" and abort these steps. */
			} elseif($node->nodeName === 'body') {
				$this->mode = self::IN_BODY;
				break;

			/* 13. If node is a frameset element, then switch the insertion
			mode to "in frameset" and abort these steps. (innerHTML case) */
			} elseif($node->nodeName === 'frameset') {
				$this->mode = self::IN_FRAME;
				break;

			/* 14. If node is an html element, then: if the head element
			pointer is null, switch the insertion mode to "before head",
			otherwise, switch the insertion mode to "after head". In either
			case, abort these steps. (innerHTML case) */
			} elseif($node->nodeName === 'html') {
				$this->mode = ($this->head_pointer === null)
					? self::BEFOR_HEAD
					: self::AFTER_HEAD;

				break;

			/* 15. If last is true, then set the insertion mode to "in body"
			and	abort these steps. (innerHTML case) */
			} elseif($last) {
				$this->mode = self::IN_BODY;
				break;
			}
		}
	}

	private function closeCell() {
		/* If the stack of open elements has a td or th element in table scope,
		then act as if an end tag token with that tag name had been seen. */
		foreach(array('td', 'th') as $cell) {
			if($this->elementInScope($cell, true)) {
				$this->inCell(array(
					'name' => $cell,
					'type' => HTML5::ENDTAG
				));

				break;
			}
		}
	}

	public function save() {
		return $this->dom;
	}
}
?>
